__init__ Module#
__init__
Module#
Panel is a high level app and dashboarding framework#
Panel is an open-source Python library that lets you create custom interactive web apps and dashboards by connecting user-defined widgets to plots, images, tables, or text.
Panel works with the tools you know and ❤️.
Check out https://panel.holoviz.org/

Panel Dashboard#
How to develop a Panel app in 3 simple steps#
Write the app
>>> import panel as pn
>>> pn.extension(sizing_mode="stretch_width", template="fast")
>>> pn.state.template.param.update(title="My Data App")
>>> pn.panel(some_python_object).servable()
Run your app
$ panel serve my_script.py –autoreload –show
or
$ panel serve my_notebook.ipynb –autoreload –show
The app will be available in your browser!
Change your code and save it
The app will reload with your changes!
You can also add automatic reload to jupyterlab. Check out https://blog.holoviz.org/panel_0.12.0.html#JupyterLab-previews
To learn more about Panel check out https://panel.holoviz.org/getting_started/index.html
- class panel.__init__.Accordion(*objects, **params)[source]#
Bases:
NamedListPanel
The Accordion layout is a type of Card layout that allows switching between multiple objects by clicking on the corresponding card header.
The labels for each card will default to the name parameter of the card’s contents, but may also be defined explicitly as part of a tuple.
Like Column and Row, Accordion has a list-like API that allows interactively updating and modifying the cards using the methods append, extend, clear, insert, pop, remove and __setitem__.
Reference: https://panel.holoviz.org/reference/layouts/Accordion.html
- Example:
>>> pn.Accordion(some_pane_with_a_name, ("Plot", some_plot))
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.NamedListLike
: objectspanel.layout.base.NamedListPanel
: scrollactive
= param.List(bounds=(0, None), default=[], label=’Active’)List of indexes of active cards.
active_header_background
= param.String(default=’#ccc’, label=’Active header background’)Color for currently active headers.
header_color
= param.String(default=’’, label=’Header color’)A valid CSS color to apply to the expand button.
header_background
= param.String(default=’’, label=’Header background’)A valid CSS color for the header background.
toggle
= param.Boolean(bounds=(0, 1), default=False, label=’Toggle’)Whether to toggle between active cards or allow multiple cards
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(pane: Any) None #
Appends an object to the tabs.
- Parameters:
(object) (obj) –
- clear() None #
Clears the tabs.
- clone(*objects: Any, **params: Any) NamedListLike #
Makes a copy of the Tabs sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned Tabs object.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned Tabs object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(panes: Iterable[Any]) None #
Extends the the tabs with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, pane: Any) None #
Inserts an object in the tabs at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the tabs.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector: type | Callable[[Viewable], bool] | None = None) List[Viewable] [source]#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Card(*objects, **params)[source]#
Bases:
Column
A Card layout allows arranging multiple panel objects in a collapsible, vertical container with a header bar.
Reference: https://panel.holoviz.org/reference/layouts/Card.html
- Example:
>>> pn.Card( ... some_widget, some_pane, some_python_object, ... title='Card', styles=dict(background='WhiteSmoke'), ... )
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectspanel.layout.base.ListPanel
: scrollcss_classes
= param.List(bounds=(0, None), default=[‘card’], label=’Css classes’)CSS classes to apply to the overall Card.
active_header_background
= param.String(default=’’, label=’Active header background’)A valid CSS color for the header background when not collapsed.
button_css_classes
= param.List(bounds=(0, None), default=[‘card-button’], label=’Button css classes’)CSS classes to apply to the button element.
collapsible
= param.Boolean(bounds=(0, 1), default=True, label=’Collapsible’)Whether the Card should be expandable and collapsible.
collapsed
= param.Boolean(bounds=(0, 1), default=False, label=’Collapsed’)Whether the contents of the Card are collapsed.
header
= param.Parameter(allow_None=True, label=’Header’)A Panel component to display in the header bar of the Card. Will override the given title if defined.
header_background
= param.String(default=’’, label=’Header background’)A valid CSS color for the header background.
header_color
= param.String(default=’’, label=’Header color’)A valid CSS color to apply to the header text.
header_css_classes
= param.List(bounds=(0, None), default=[‘card-header’], label=’Header css classes’)CSS classes to apply to the header element.
hide_header
= param.Boolean(bounds=(0, 1), default=False, label=’Hide header’)Whether to skip rendering the header.
title_css_classes
= param.List(bounds=(0, None), default=[‘card-title’], label=’Title css classes’)CSS classes to apply to the header title.
title
= param.String(default=’’, label=’Title’)A title to be displayed in the Card header, will be overridden by the header if defined.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector: type | Callable[[Viewable], bool] | None = None) List[Viewable] [source]#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Column(*objects: Any, **params: Any)[source]#
Bases:
ListPanel
The Column layout allows arranging multiple panel objects in a vertical container.
It has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which makes it possible to interactively update and modify the layout.
Reference: https://panel.holoviz.org/reference/layouts/Column.html
- Example:
>>> pn.Column(some_widget, some_pane, some_python_object)
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectspanel.layout.base.ListPanel
: scroll- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.FlexBox(*objects, **params)[source]#
Bases:
ListLike
,ReactiveHTML
The FlexBox is a list-like layout (unlike GridSpec) that wraps objects into a CSS flex container.
It has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which makes it possible to interactively update and modify the layout. It exposes all the CSS options for controlling the behavior and layout of the flex box.
Reference: https://panel.holoviz.org/reference/layouts/FlexBox.html
- Example:
>>> pn.FlexBox( ... some_python_object, another_python_object, ..., ... the_last_python_object ... )
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectsalign_content
= param.Selector(default=’flex-start’, label=’Align content’, objects=[‘normal’, ‘flex-start’, ‘flex-end’, ‘center’, ‘space-between’, ‘space-around’, ‘space-evenly’, ‘stretch’, ‘start’, ‘end’, ‘baseline’, ‘first baseline’, ‘last baseline’])Defines how a flex container’s lines align when there is extra space in the cross-axis.
align_items
= param.Selector(default=’flex-start’, label=’Align items’, objects=[‘stretch’, ‘flex-start’, ‘flex-end’, ‘center’, ‘baseline’, ‘first baseline’, ‘last baseline’, ‘start’, ‘end’, ‘self-start’, ‘self-end’])Defines the default behavior for how flex items are laid out along the cross axis on the current line.
flex_direction
= param.Selector(default=’row’, label=’Flex direction’, objects=[‘row’, ‘row-reverse’, ‘column’, ‘column-reverse’])This establishes the main-axis, thus defining the direction flex items are placed in the flex container.
flex_wrap
= param.Selector(default=’wrap’, label=’Flex wrap’, objects=[‘nowrap’, ‘wrap’, ‘wrap-reverse’])Whether and how to wrap items in the flex container.
justify_content
= param.Selector(default=’flex-start’, label=’Justify content’, objects=[‘flex-start’, ‘flex-end’, ‘center’, ‘space-between’, ‘space-around’, ‘space-evenly’, ‘start’, ‘end’, ‘left’, ‘right’])Defines the alignment along the main axis.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- on_event(node: str, event: str, callback: Callable) None #
Registers a callback to be executed when the specified DOM event is triggered on the named node. Note that the named node must be declared in the HTML. To create a named node you must give it an id of the form id=”name”, where name will be the node identifier.
- Parameters:
node (str) – Named node in the HTML identifiable via id of the form id=”name”.
event (str) – Name of the DOM event to add an event listener to.
callback (callable) – A callable which will be given the DOMEvent object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)[source]#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.FloatPanel(*objects, name='', **params)[source]#
Bases:
ListLike
,ReactiveHTML
Float provides a floating panel layout.
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectsconfig
= param.Dict(class_=<class ‘dict’>, default={}, label=’Config’)Additional jsPanel configuration with precedence over parameter values.
contained
= param.Boolean(bounds=(0, 1), default=True, label=’Contained’)Whether the component is contained within parent container or completely free floating.
position
= param.Selector(default=’right-top’, label=’Position’, objects=[‘center’, ‘left-top’, ‘center-top’, ‘right-top’, ‘right-center’, ‘right-bottom’, ‘center-bottom’, ‘left-bottom’, ‘left-center’])The initial position if the container is free-floating.
offsetx
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Offsetx’)Horizontal offset in pixels.
offsety
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Offsety’)Vertical offset in pixels.
theme
= param.String(default=’primary’, label=’Theme’)The theme which can be one of: - Built-ins: ‘default’, ‘primary’, ‘secondary’, ‘info’, ‘success’, ‘warning’, ‘danger’, ‘light’, ‘dark’ and ‘none’ - HEX, RGB and HSL color values like ‘#123456’ Any standardized color name like ‘forestgreen’ and color names from the Material Design Color System like ‘purple900’ - Additionally a theme string may include one of the modifiers ‘filled’, ‘filledlight’, ‘filleddark’ or ‘fillcolor’ separated from the theme color by a space like ‘primary
status
= param.Selector(default=’normalized’, label=’Status’, objects=[‘normalized’, ‘maximized’, ‘minimized’, ‘smallified’, ‘smallifiedmax’, ‘closed’])The current status of the panel.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- on_event(node: str, event: str, callback: Callable) None #
Registers a callback to be executed when the specified DOM event is triggered on the named node. Note that the named node must be declared in the HTML. To create a named node you must give it an id of the form id=”name”, where name will be the node identifier.
- Parameters:
node (str) – Named node in the HTML identifiable via id of the form id=”name”.
event (str) – Name of the DOM event to add an event listener to.
callback (callable) – A callable which will be given the DOMEvent object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector: Optional[type | Callable[['Viewable'], bool]] = None) List['Viewable'] #
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.GridBox(*objects: Any, **params: Any)[source]#
Bases:
ListPanel
The GridBox is a list-like layout (unlike GridSpec) that wraps objects into a grid according to the specified nrows and ncols parameters.
It has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which makes it possible to interactively update and modify the layout.
Reference: https://panel.holoviz.org/reference/layouts/GridBox.html
- Example:
>>> pn.GridBox( ... python_object_1, python_object_2, ..., ... python_object_24, ncols=6 ... )
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectspanel.layout.base.ListPanel
: scrollnrows
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Nrows’)Number of rows to reflow the layout into.
ncols
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Ncols’)Number of columns to reflow the layout into.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.GridSpec(**params)[source]#
Bases:
Panel
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingobjects
= param.Dict(class_=<class ‘dict’>, default={}, label=’Objects’)The dictionary of child objects that make up the grid.
mode
= param.ObjectSelector(default=’warn’, label=’Mode’, objects=[‘warn’, ‘error’, ‘override’])Whether to warn, error or simply override on overlapping assignment.
ncols
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Ncols’)Limits the number of columns that can be assigned.
nrows
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Nrows’)Limits the number of rows that can be assigned.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- clone(**params)[source]#
Makes a copy of the GridSpec sharing the same parameters.
- Parameters:
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned GridSpec object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.GridStack(**params)[source]#
Bases:
ReactiveHTML
,GridSpec
The GridStack layout allows arranging multiple Panel objects in a grid using a simple API to assign objects to individual grid cells or to a grid span.
Other layout containers function like lists, but a GridSpec has an API similar to a 2D array, making it possible to use 2D assignment to populate, index, and slice the grid.
Reference: https://panel.holoviz.org/reference/layouts/GridStack.html
- Example:
>>> pn.extension('gridstack') >>> gstack = GridStack(sizing_mode='stretch_both') >>> gstack[ : , 0: 3] = pn.Spacer(styles=dict(background='red')) >>> gstack[0:2, 3: 9] = pn.Spacer(styles=dict(background='green')) >>> gstack[2:4, 6:12] = pn.Spacer(styles=dict(background='orange')) >>> gstack[4:6, 3:12] = pn.Spacer(styles=dict(background='blue')) >>> gstack[0:2, 9:12] = pn.Spacer(styles=dict(background='purple'))
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.grid.GridSpec
: objects, mode, ncols, nrowsheight
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Height’)The height of the component (in pixels). This can be either fixed or preferred height, depending on height sizing policy.
width
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Width’)The width of the component (in pixels). This can be either fixed or preferred width, depending on width sizing policy.
allow_resize
= param.Boolean(bounds=(0, 1), default=True, label=’Allow resize’)Allow resizing the grid cells.
allow_drag
= param.Boolean(bounds=(0, 1), default=True, label=’Allow drag’)Allow dragging the grid cells.
state
= param.List(bounds=(0, None), default=[], label=’State’)Current state of the grid (updated as items are resized and dragged).
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- clone(**params)#
Makes a copy of the GridSpec sharing the same parameters.
- Parameters:
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned GridSpec object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- on_event(node: str, event: str, callback: Callable) None #
Registers a callback to be executed when the specified DOM event is triggered on the named node. Note that the named node must be declared in the HTML. To create a named node you must give it an id of the form id=”name”, where name will be the node identifier.
- Parameters:
node (str) – Named node in the HTML identifiable via id of the form id=”name”.
event (str) – Name of the DOM event to add an event listener to.
callback (callable) – A callable which will be given the DOMEvent object.
- pprint() None #
Prints a compositional repr of the class.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.HSpacer(refs=None, **params)[source]#
Bases:
Spacer
The HSpacer layout provides responsive vertical spacing.
Using this component we can space objects equidistantly in a layout and allow the empty space to shrink when the browser is resized.
How-to: https://panel.holoviz.org/how_to/layout/spacing.html#spacer-components
- Example:
>>> pn.Row( ... pn.layout.HSpacer(), 'Item 1', ... pn.layout.HSpacer(), 'Item 2', ... pn.layout.HSpacer() ... )
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, visiblepanel.viewable.Viewable
: loadingsizing_mode
= param.Parameter(constant=True, default=’stretch_width’, label=’Sizing mode’, readonly=True)How the component should size itself. This is a high-level setting for maintaining width and height of the component. To gain more fine grained control over sizing, use
width_policy
,height_policy
andaspect_ratio
instead (those take precedence oversizing_mode
)."fixed"
Component is not responsive. It will retain its original width and height regardless of any subsequent browser window resize events."stretch_width"
Component will responsively resize to stretch to the available width, without maintaining any aspect ratio. The height of the component depends on the type of the component and may be fixed or fit to component’s contents."stretch_height"
Component will responsively resize to stretch to the available height, without maintaining any aspect ratio. The width of the component depends on the type of the component and may be fixed or fit to component’s contents."stretch_both"
Component is completely responsive, independently in width and height, and will occupy all the available horizontal and vertical space, even if this changes the aspect ratio of the component."scale_width"
Component will responsively resize to stretch to the available width, while maintaining the original or provided aspect ratio."scale_height"
Component will responsively resize to stretch to the available height, while maintaining the original or provided aspect ratio."scale_both"
Component will responsively resize to both the available width and height, while maintaining the original or provided aspect ratio.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- clone(**params) Viewable #
Makes a copy of the object sharing the same parameters.
- Parameters:
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned Viewable object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector: Optional[type | Callable[['Viewable'], bool]] = None) List['Viewable'] #
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Param(object=None, **params)[source]#
Bases:
PaneBase
Param panes render a Parameterized class to a set of widgets which are linked to the parameter values on the class.
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, min_width, min_height, max_width, max_height, styles, stylesheets, tags, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.pane.base.PaneBase
: margin, objectheight
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Height’)Height of widgetbox the parameter widgets are displayed in.
width
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Width’)Width of widgetbox the parameter widgets are displayed in.
default_layout
= param.ClassSelector(class_=<class ‘panel.layout.base.Panel’>, default=<class ‘panel.layout.base.Column’>, label=’Default layout’)Defines the layout the model(s) returned by the pane will be placed in.
display_threshold
= param.Number(default=0, inclusive_bounds=(True, True), label=’Display threshold’)Parameters with precedence below this value are not displayed.
default_precedence
= param.Number(default=1e-08, inclusive_bounds=(True, True), label=’Default precedence’)Precedence value to use for parameters with no declared precedence. By default, zero predecence is available for forcing some parameters to the top of the list, and other values above the default_precedence values can be used to sort or group parameters arbitrarily.
expand
= param.Boolean(bounds=(0, 1), default=False, label=’Expand’)Whether parameterized subobjects are expanded or collapsed on instantiation.
expand_button
= param.Boolean(allow_None=True, bounds=(0, 1), label=’Expand button’)Whether to add buttons to expand and collapse sub-objects.
expand_layout
= param.Parameter(default=<class ‘panel.layout.base.Column’>, label=’Expand layout’)Layout to expand sub-objects into.
hide_constant
= param.Boolean(bounds=(0, 1), default=False, label=’Hide constant’)Whether to hide widgets of constant parameters.
initializer
= param.Callable(allow_None=True, label=’Initializer’)User-supplied function that will be called on initialization, usually to update the default Parameter values of the underlying parameterized object.
parameters
= param.List(allow_None=True, bounds=(0, None), default=[], label=’Parameters’)If set this serves as a whitelist of parameters to display on the supplied Parameterized object.
show_labels
= param.Boolean(bounds=(0, 1), default=True, label=’Show labels’)Whether to show labels for each widget
show_name
= param.Boolean(bounds=(0, 1), default=True, label=’Show name’)Whether to show the parameterized object’s name
sort
= param.ClassSelector(class_=(<class ‘bool’>, <class ‘collections.abc.Callable’>), default=False, label=’Sort’)If True the widgets will be sorted alphabetically by label. If a callable is provided it will be used to sort the Parameters, for example lambda x: x[1].label[::-1] will sort by the reversed label.
widgets
= param.Dict(allow_None=True, class_=<class ‘dict’>, label=’Widgets’)Dictionary of widget overrides, mapping from parameter name to widget class.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- classmethod applies(obj: Any) float | bool | None [source]#
Returns boolean or float indicating whether the Pane can render the object.
If the priority of the pane is set to None, this method may also be used to define a float priority depending on the object being rendered.
- clone(object: Optional[Any] = None, **params) T #
Makes a copy of the Pane sharing the same parameters.
- Parameters:
object (Optional new object to render) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned Pane object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- classmethod get_pane_type(obj: Any, **kwargs) Type[PaneBase] #
Returns the applicable Pane type given an object by resolving the precedence of all types whose applies method declares that the object is supported.
- Parameters:
(object) (obj) –
- Return type:
The applicable Pane type with the highest precedence.
- get_root(doc: Optional[Document] = None, comm: Comm | None = None, preprocess: bool = True) Model [source]#
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.document.Document) – Optional Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (bool (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)[source]#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Row(*objects: Any, **params: Any)[source]#
Bases:
ListPanel
The Row layout allows arranging multiple panel objects in a horizontal container.
It has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which makes it possible to interactively update and modify the layout.
Reference: https://panel.holoviz.org/reference/layouts/Row.html
- Example:
>>> pn.Row(some_widget, some_pane, some_python_object)
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectspanel.layout.base.ListPanel
: scroll- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Spacer(refs=None, **params)[source]#
Bases:
Reactive
The Spacer layout is a very versatile component which makes it easy to put fixed or responsive spacing between objects.
Like all other components spacers support both absolute and responsive sizing modes.
How-to: https://panel.holoviz.org/how_to/layout/spacing.html#spacer-components
- Example:
>>> pn.Row( ... 1, pn.Spacer(width=200), ... 2, pn.Spacer(width=100), ... 3 ... )
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loading- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- clone(**params) Viewable #
Makes a copy of the object sharing the same parameters.
- Parameters:
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned Viewable object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector: Optional[type | Callable[['Viewable'], bool]] = None) List['Viewable'] #
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Tabs(*objects, **params)[source]#
Bases:
NamedListPanel
The Tabs layout allows switching between multiple objects by clicking on the corresponding tab header.
Tab labels may be defined explicitly as part of a tuple or will be inferred from the name parameter of the tab’s contents.
Like Column and Row, Tabs has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which make it possible to interactively update and modify the tabs.
Reference: https://panel.holoviz.org/reference/layouts/Tabs.html
- Example:
>>> pn.Tabs(('Scatter', plot1), some_pane_with_a_name)
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.NamedListLike
: objectspanel.layout.base.NamedListPanel
: active, scrollheight
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Height’)The height of the component (in pixels). This can be either fixed or preferred height, depending on height sizing policy.
width
= param.Integer(allow_None=True, bounds=(0, None), inclusive_bounds=(True, True), label=’Width’)The width of the component (in pixels). This can be either fixed or preferred width, depending on width sizing policy.
closable
= param.Boolean(bounds=(0, 1), default=False, label=’Closable’)Whether it should be possible to close tabs.
dynamic
= param.Boolean(bounds=(0, 1), default=False, label=’Dynamic’)Dynamically populate only the active tab.
tabs_location
= param.ObjectSelector(default=’above’, label=’Tabs location’, objects=[‘above’, ‘below’, ‘left’, ‘right’])The location of the tabs relative to the tab contents.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(pane: Any) None #
Appends an object to the tabs.
- Parameters:
(object) (obj) –
- clear() None #
Clears the tabs.
- clone(*objects: Any, **params: Any) NamedListLike #
Makes a copy of the Tabs sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned Tabs object.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned Tabs object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(panes: Iterable[Any]) None #
Extends the the tabs with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, pane: Any) None #
Inserts an object in the tabs at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the tabs.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.Template(template: str | _Template, nb_template: str | _Template | None = None, items: Optional[Dict[str, Any]] = None, **params)[source]#
Bases:
BaseTemplate
A Template is a high-level component to render multiple Panel objects into a single HTML document defined through a Jinja2 template. The Template object is given a Jinja2 template and then allows populating this template by adding Panel objects, which are given unique names. These unique names may then be referenced in the template to insert the rendered Panel object at a specific location. For instance, given a Jinja2 template that defines roots A and B like this:
<div> {{ embed(roots.A) }} </div> <div> {{ embed(roots.B) }} </div>
We can then populate the template by adding panel ‘A’ and ‘B’ to the Template object:
template.add_panel(‘A’, pn.panel(‘A’)) template.add_panel(‘B’, pn.panel(‘B’))
Once a template has been fully populated it can be rendered using the same API as other Panel objects. Note that all roots that have been declared using the {{ embed(roots.A) }} syntax in the Jinja2 template must be defined when rendered.
Since embedding complex CSS frameworks inside a notebook can have undesirable side-effects and a notebook does not afford the same amount of screen space a Template may given separate template and nb_template objects. This allows for different layouts when served as a standalone server and when used in the notebook.
Parameters inherited from:
panel.template.base.BaseTemplate
: design, location, theme- add_panel(name: str, panel: Viewable, tags: List[str] = []) None [source]#
Add panels to the Template, which may then be referenced by the given name using the jinja2 embed macro.
- Parameters:
name (str) – The name to refer to the panel by in the template
panel (panel.Viewable) – A Panel component to embed in the template.
- add_variable(name: str, value: Any) None [source]#
Add parameters to the template, which may then be referenced by the given name in the Jinja2 template.
- Parameters:
name (str) – The name to refer to the panel by in the template
value (object) – Any valid Jinja2 variable type.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources=None, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None) None #
Saves Panel objects to file.
- Parameters:
filename (string or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
- select(selector=None)#
Iterates over the Template and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) BaseTemplate #
Serves the template and returns self to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The template
- server_doc(doc: Optional[Document] = None, title: str = None, location: bool | Location = True) Document #
Returns a servable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The Bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The Bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- theme#
alias of
DefaultTheme
- class panel.__init__.VSpacer(refs=None, **params)[source]#
Bases:
Spacer
The VSpacer layout provides responsive vertical spacing.
Using this component we can space objects equidistantly in a layout and allow the empty space to shrink when the browser is resized.
Reference: https://panel.holoviz.org/user_guide/Customization.html#spacers
- Example:
>>> pn.Column( ... pn.layout.VSpacer(), 'Item 1', ... pn.layout.VSpacer(), 'Item 2', ... pn.layout.VSpacer() ... )
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, css_classes, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, visiblepanel.viewable.Viewable
: loadingsizing_mode
= param.Parameter(constant=True, default=’stretch_height’, label=’Sizing mode’, readonly=True)How the component should size itself. This is a high-level setting for maintaining width and height of the component. To gain more fine grained control over sizing, use
width_policy
,height_policy
andaspect_ratio
instead (those take precedence oversizing_mode
)."fixed"
Component is not responsive. It will retain its original width and height regardless of any subsequent browser window resize events."stretch_width"
Component will responsively resize to stretch to the available width, without maintaining any aspect ratio. The height of the component depends on the type of the component and may be fixed or fit to component’s contents."stretch_height"
Component will responsively resize to stretch to the available height, without maintaining any aspect ratio. The width of the component depends on the type of the component and may be fixed or fit to component’s contents."stretch_both"
Component is completely responsive, independently in width and height, and will occupy all the available horizontal and vertical space, even if this changes the aspect ratio of the component."scale_width"
Component will responsively resize to stretch to the available width, while maintaining the original or provided aspect ratio."scale_height"
Component will responsively resize to stretch to the available height, while maintaining the original or provided aspect ratio."scale_both"
Component will responsively resize to both the available width and height, while maintaining the original or provided aspect ratio.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- clone(**params) Viewable #
Makes a copy of the object sharing the same parameters.
- Parameters:
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned Viewable object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector: Optional[type | Callable[['Viewable'], bool]] = None) List['Viewable'] #
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- class panel.__init__.WidgetBox(*objects: Any, **params: Any)[source]#
Bases:
ListPanel
The WidgetBox layout allows arranging multiple panel objects in a vertical (or horizontal) container.
It is largely identical to the Column layout, but has some default styling that makes widgets be clearly grouped together visually.
It has a list-like API with methods to append, extend, clear, insert, pop, remove and __setitem__, which make it possible to interactively update and modify the layout.
Reference: https://panel.holoviz.org/reference/layouts/WidgetBox.html
- Example:
>>> pn.WidgetBox(some_widget, another_widget)
Parameters inherited from:
panel.viewable.Layoutable
: align, aspect_ratio, background, design, height, min_width, min_height, max_width, max_height, margin, styles, stylesheets, tags, width, width_policy, height_policy, sizing_mode, visiblepanel.viewable.Viewable
: loadingpanel.layout.base.ListLike
: objectspanel.layout.base.ListPanel
: scrollcss_classes
= param.List(bounds=(0, None), default=[‘panel-widget-box’], label=’Css classes’)CSS classes to apply to the layout.
disabled
= param.Boolean(bounds=(0, 1), default=False, label=’Disabled’)Whether the widget is disabled.
horizontal
= param.Boolean(bounds=(0, 1), default=False, label=’Horizontal’)Whether to lay out the widgets in a Row layout as opposed to a Column layout.
- app(notebook_url: str = 'localhost:8888', port: int = 0) Server #
Displays a bokeh server app inline in the notebook.
- Parameters:
notebook_url (str) – URL to the notebook server
port (int (optional, default=0)) – Allows specifying a specific port
- append(obj: Any) None #
Appends an object to the layout.
- Parameters:
(object) (obj) –
- clear() None #
Clears the objects on this layout.
- clone(*objects: Any, **params: Any) ListLike #
Makes a copy of the layout sharing the same parameters.
- Parameters:
objects (Objects to add to the cloned layout.) –
params (Keyword arguments override the parameters on the clone.) –
- Return type:
Cloned layout object
- controls(parameters: List[str] = [], jslink: bool = True, **kwargs) Panel #
Creates a set of widgets which allow manipulating the parameters on this instance. By default all parameters which support linking are exposed, but an explicit list of parameters can be provided.
- Parameters:
parameters (list(str)) – An explicit list of parameters to return controls for.
jslink (bool) – Whether to use jslinks instead of Python based links. This does not allow using all types of parameters.
kwargs (dict) – Additional kwargs to pass to the Param pane(s) used to generate the controls widgets.
- Return type:
A layout of the controls
- embed(max_states: int = 1000, max_opts: int = 3, json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = False, states={}) None #
Renders a static version of a panel in a notebook by evaluating the set of states defined by the widgets in the model. Note this will only work well for simple apps with a relatively small state space.
- Parameters:
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for JSON filename
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=False)) – Whether to report progress
states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
- extend(objects: Iterable[Any]) None #
Extends the objects on this layout with a list.
- Parameters:
(list) (objects) –
- get_root(doc: Optional[Document] = None, comm: Optional[Comm] = None, preprocess: bool = True) Model #
Returns the root model and applies pre-processing hooks
- Parameters:
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
comm (pyviz_comms.Comm) – Optional pyviz_comms when working in notebook
preprocess (boolean (default=True)) – Whether to run preprocessing hooks
- Return type:
Returns the bokeh model corresponding to this panel object
- insert(index: int, obj: Any) None #
Inserts an object in the layout at the specified index.
- Parameters:
(int) (index) –
(object) (object) –
- jscallback(args: Dict[str, Any] = {}, **callbacks: str) Callback #
Allows defining a JS callback to be triggered when a property changes on the source object. The keyword arguments define the properties that trigger a callback and the JS code that gets executed.
- Parameters:
args (dict) – A mapping of objects to make available to the JS callback
**callbacks (dict) – A mapping between properties on the source model and the code to execute when that property changes
- Returns:
callback – The Callback which can be used to disable the callback.
- Return type:
- jslink(target: JSLinkTarget, code: Dict[str, str] = None, args: Optional[Dict] = None, bidirectional: bool = False, **links: str) Link #
Links properties on the this Reactive object to those on the target Reactive object in JS code.
Supports two modes, either specify a mapping between the source and target model properties as keywords or provide a dictionary of JS code snippets which maps from the source parameter to a JS code snippet which is executed when the property changes.
- Parameters:
target (panel.viewable.Viewable | bokeh.model.Model | holoviews.core.dimension.Dimensioned) – The target to link the value to.
code (dict) – Custom code which will be executed when the widget value changes.
args (dict) – A mapping of objects to make available to the JS callback
bidirectional (boolean) – Whether to link source and target bi-directionally
**links (dict) – A mapping between properties on the source model and the target model property to link it to.
- Returns:
link – The GenericLink which can be used unlink the widget and the target model.
- Return type:
GenericLink
- link(target: param.Parameterized, callbacks: Optional[Dict[str, str | Callable]] = None, bidirectional: bool = False, **links: str) Watcher #
Links the parameters on this Reactive object to attributes on the target Parameterized object.
Supports two modes, either specify a mapping between the source and target object parameters as keywords or provide a dictionary of callbacks which maps from the source parameter to a callback which is triggered when the parameter changes.
- Parameters:
target (param.Parameterized) – The target object of the link.
callbacks (dict | None) – Maps from a parameter in the source object to a callback.
bidirectional (bool) – Whether to link source and target bi-directionally
**links (dict) – Maps between parameters on this object to the parameters on the supplied object.
- pprint() None #
Prints a compositional repr of the class.
- reverse() None #
Reverses the objects in the layout.
- save(filename: str | os.PathLike | IO, title: Optional[str] = None, resources: Resources | None = None, template: str | Template | None = None, template_variables: Dict[str, Any] = {}, embed: bool = False, max_states: int = 1000, max_opts: int = 3, embed_json: bool = False, json_prefix: str = '', save_path: str = './', load_path: Optional[str] = None, progress: bool = True, embed_states: Dict[Any, Any] = {}, as_png: bool | None = None, **kwargs) None #
Saves Panel objects to file.
- Parameters:
filename (str or file-like object) – Filename to save the plot to
title (string) – Optional title for the plot
resources (bokeh resources) – One of the valid bokeh.resources (e.g. CDN or INLINE)
template – passed to underlying io.save
template_variables – passed to underlying io.save
embed (bool) – Whether the state space should be embedded in the saved file.
max_states (int) – The maximum number of states to embed
max_opts (int) – The maximum number of states for a single widget
embed_json (boolean (default=True)) – Whether to export the data to json files
json_prefix (str (default='')) – Prefix for the auto-generated json directory
save_path (str (default='./')) – The path to save json files to
load_path (str (default=None)) – The path or URL the json files will be loaded from.
progress (boolean (default=True)) – Whether to report progress
embed_states (dict (default={})) – A dictionary specifying the widget values to embed for each widget
as_png (boolean (default=None)) – To save as a .png. If None save_png will be true if filename is string and ends with png.
- select(selector=None)#
Iterates over the Viewable and any potential children in the applying the Selector.
- Parameters:
selector (type or callable or None) – The selector allows selecting a subset of Viewables by declaring a type or callable function to filter by.
- Returns:
viewables
- Return type:
list(Viewable)
- servable(title: Optional[str] = None, location: bool | 'Location' = True, area: str = 'main', target: Optional[str] = None) ServableMixin #
Serves the object or adds it to the configured pn.state.template if in a panel serve context, writes to the DOM if in a pyodide context and returns the Panel object to allow it to display itself in a notebook context.
- Parameters:
title (str) – A string title to give the Document (if served as an app)
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
area (str (deprecated)) – The area of a template to add the component too. Only has an effect if pn.config.template has been set.
target (str) – Target area to write to. If a template has been configured on pn.config.template this refers to the target area in the template while in pyodide this refers to the ID of the DOM node to write to.
- Return type:
The Panel object itself
- server_doc(doc: Optional[Document] = None, title: Optional[str] = None, location: bool | 'Location' = True) Document #
Returns a serveable bokeh Document with the panel attached
- Parameters:
doc (bokeh.Document (optional)) – The bokeh Document to attach the panel to as a root, defaults to bokeh.io.curdoc()
title (str) – A string title to give the Document
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
doc – The bokeh document the panel was attached to
- Return type:
bokeh.Document
- show(title: Optional[str] = None, port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str] = None, threaded: bool = False, verbose: bool = True, open: bool = True, location: bool | 'Location' = True, **kwargs) threading.Thread | 'Server' #
Starts a Bokeh server and displays the Viewable in a new tab.
- Parameters:
title (str | None) – A string title to give the Document (if served as an app)
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) – A list of hosts that can connect to the websocket. This is typically required when embedding a server app in an external web site. If None, “localhost” is used.
threaded (boolean (optional, default=False)) – Whether to launch the Server on a separate thread, allowing interactive use.
verbose (boolean (optional, default=True)) – Whether to print the address and port
open (boolean (optional, default=True)) – Whether to open the server in a new browser tab
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
- Returns:
server – Returns the Bokeh server instance or the thread the server was launched on (if threaded=True)
- Return type:
bokeh.server.Server or threading.Thread
- panel.__init__.bind(function, *args, watch=False, **kwargs)[source]#
Returns a “reactive” function that binds (some of) its arguments to Parameter values. This means that the “reactive” function can (or will if watch=True) be automatically invoked whenever the underlying parameter values change.
How-to: https://panel.holoviz.org/how_to/interactivity/bind_function.html
- Example:
>>> def add(a,b): ... return a+b >>> widget = pn.widgets.IntSlider(value=1, start=1, end=5) >>> iadd = pn.bind(add, a=widget, b=1) >>> pn.Column(widget, iadd)
This function is the same as param.bind, but extended so that if widgets are provided as values, the underlying value Parameter of the widget is extracted as the actual argument value and dependency. This extension is solely for syntactic convenience, allowing the widget to be passed in as a synonym for the underlying parameter. Apart from that extension, this function otherwise behaves the same as the corresponding Param function.
This function allows dynamically recomputing the output of the provided function whenever one of the bound parameters changes. For Panel, the parameters are typically values of widgets, making it simple to have output that reacts to changes in the widgets. Arguments an also be bound to other parameters (not part of widgets) or even to constants.
- Parameters:
function (callable) – The function to bind constant or dynamic args and kwargs to.
args (object, param.Parameter, panel.widget.Widget, or ipywidget) – Positional arguments to bind to the function.
watch (boolean) – Whether to evaluate the function automatically whenever one of the bound parameters changes.
kwargs (object, param.Parameter, panel.widget.Widget, or ipywidget) – Keyword arguments to bind to the function.
- Returns:
Returns a new function with the args and kwargs bound to it and
annotated with all dependencies.
- panel.__init__.cache(func=None, hash_funcs=None, max_items=None, policy='LRU', ttl=None, to_disk=False, cache_path='./cache')[source]#
Decorator to memoize functions with options to configure the caching behavior
- Parameters:
func (callable) – The function to cache.
hash_funcs (dict or None) – A dictionary mapping from a type to a function which returns a hash for an object of that type. If provided this will override the default hashing function provided by Panel.
policy (str) –
- A caching policy when max_items is set, must be one of:
FIFO: First in - First out
LRU: Least recently used
LFU: Least frequently used
ttl (float or None) – The number of seconds to keep an item in the cache, or None if the cache should not expire. The default is None.
to_disk (bool) – Whether to cache to disk using diskcache.
cache_dir (str) – Directory to cache to on disk.
- panel.__init__.depends(*args, **kwargs)[source]#
Python decorator annotating a function or Parameterized method to express its dependencies on a set of Parameters.
Despite still being available, usage of pn.depends is no longer recommended, in favor of the less intrusive pn.bind.
Returns a “reactive” function that binds (some of) its arguments to Parameter values. This means that the “reactive” function can (or will if watch=True) be automatically invoked whenever the underlying parameter values change.
- Example:
>>> widget = pn.widgets.IntSlider(value=1, start=1, end=5) >>> @pn.depends(a=widget) ... def add(a,b=1): ... return a+b >>> pn.Column(widget, add)
This function is the same as the corresponding param.depends decorator, but extended so that if widgets are provided as dependencies, the underlying value Parameter of the widget is extracted as the actual dependency.
This extension is solely for syntactic convenience, allowing the widget to be passed in as a synonym for the underlying parameter. Apart from that extension, this decorator otherwise behaves the same as the underlying Param depends decorator.
For the Panel version of the decorator, the specified dependencies can either be Parameter instances, Panel or ipywidgets widgets, or, if a Parameterized method is supplied rather than a function, they can be defined either as string names of Parameters of this object or as Parameter objects of this object’s subobjects (i.e., Parameterized objects that are values of this object’s Parameters). See the docs for the corresponding param.depends decorator for further details.
- panel.__init__.extension#
alias of
panel_extension
- panel.__init__.ipywidget(obj: Any, doc=None, **kwargs: Any)[source]#
Returns an ipywidget model which renders the Panel object.
Requires jupyter_bokeh to be installed.
- Parameters:
obj (object) – Any Panel object or object which can be rendered with Panel
doc (bokeh.Document) – Bokeh document the bokeh model will be attached to.
**kwargs (dict) – Keyword arguments passed to the pn.panel utility function
- Return type:
Returns an ipywidget model which renders the Panel object.
- panel.__init__.panel(obj: Any, **kwargs) Viewable [source]#
Creates a displayable Panel object given any valid Python object.
The appropriate Pane to render a specific object is determined by iterating over all defined Pane types and querying it’s .applies method for a priority value.
Any keyword arguments are passed down to the applicable Pane.
To lazily render components you may also provide a Python function, with or without bound parameter dependencies and set defer_load=True. Setting loading_indicator=True will display a loading indicator while the function is being evaluated.
Reference: https://panel.holoviz.org/background/components/components_overview.html#panes
>>> pn.panel(some_python_object, width=500)
- Parameters:
obj (object) – Any object to be turned into a Panel
**kwargs (dict) – Any keyword arguments to be passed to the applicable Pane
- Returns:
layout – A Viewable representation of the input object
- Return type:
- panel.__init__.serve(panels: TViewableFuncOrPath | Mapping[str, TViewableFuncOrPath], port: int = 0, address: Optional[str] = None, websocket_origin: Optional[str | list[str]] = None, loop: Optional[IOLoop] = None, show: bool = True, start: bool = True, title: Optional[str] = None, verbose: bool = True, location: bool = True, threaded: bool = False, admin: bool = False, **kwargs) threading.Thread | Server [source]#
Allows serving one or more panel objects on a single server. The panels argument should be either a Panel object or a function returning a Panel object or a dictionary of these two. If a dictionary is supplied the keys represent the slugs at which each app is served, e.g. serve({‘app’: panel1, ‘app2’: panel2}) will serve apps at /app and /app2 on the server.
Reference: https://panel.holoviz.org/user_guide/Server_Configuration.html#serving-multiple-apps
- Parameters:
panel (Viewable, function or {str: Viewable or function}) – A Panel object, a function returning a Panel object or a dictionary mapping from the URL slug to either.
port (int (optional, default=0)) – Allows specifying a specific port
address (str) – The address the server should listen on for HTTP requests.
websocket_origin (str or list(str) (optional)) –
A list of hosts that can connect to the websocket.
This is typically required when embedding a server app in an external web site.
If None, “localhost” is used.
loop (tornado.ioloop.IOLoop (optional, default=IOLoop.current())) – The tornado IOLoop to run the Server on
show (boolean (optional, default=True)) – Whether to open the server in a new browser tab on start
start (boolean(optional, default=True)) – Whether to start the Server
title (str or {str: str} (optional, default=None)) – An HTML title for the application or a dictionary mapping from the URL slug to a customized title
verbose (boolean (optional, default=True)) – Whether to print the address and port
location (boolean or panel.io.location.Location) – Whether to create a Location component to observe and set the URL location.
threaded (boolean (default=False)) – Whether to start the server on a new Thread
admin (boolean (default=False)) – Whether to enable the admin panel
kwargs (dict) – Additional keyword arguments to pass to Server instance
- class panel.__init__.widget(*args, **params)[source]#
Bases:
ParameterizedFunction
Attempts to find a widget appropriate for a given value.
- Parameters:
name (str) – The name of the resulting widget.
value (Any) – The value to deduce a widget from.
default (Any) – The default value for the resulting widget.
**params (Any) – Additional keyword arguments to pass to the widget.
- Return type:
- instance(**params)#
Return an instance of this class, copying parameters from any existing instance provided.
- script_repr(imports=[], prefix=' ')#
Same as Parameterized.script_repr, except that X.classname(Y is replaced with X.classname.instance(Y
- static widget_from_iterable(o, name)[source]#
Make widgets from an iterable. This should not be done for a string or tuple.