DataFrame#

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import pandas as pd
import panel as pn

pn.extension()

The DataFrame pane renders pandas, dask and streamz DataFrame and Series types as an HTML table. The Pane supports all the arguments to the DataFrame.to_html function.


If you need to to display a larger DataFrame or use advanced table features and interactivity we recommend using the Tabulator widget or Perspective pane instead.




Parameters:#


For details on other options for customizing the component see the layout and styling how-to guides.


    

  • bold_rows (boolean, default=True): Make the row labels bold in the output.
    • 

  • border (int, default=0): Width of the border included in the opening table tag.
    • 

  • classes (list[str]): CSS class(es) to apply to the resulting html table.
    • 

  • col_space (int, str or dict): The minimum width of each column in CSS length units. An int is assumed to be px units.
    • 

  • decimal (str, default=’.’): Character recognized as decimal separator, e.g. ‘,’ in Europe.
    • 

  • escape (boolean, default=True): Convert the characters <, >, and & to HTML-safe sequences.
    • 

  • float_format (function): Formatter function to apply to columns’ elements if they are floats. The result of this function must be a unicode string.
    • 

  • formatters (dict or list): Formatter functions to apply to columns’ elements by position or name. The result of each function must be a unicode string.
    • 

  • object (object): The DataFrame object being displayed
    • 

  • header (boolean, default=True): Whether to print column labels.
    • 

  • index (boolean, default=True): Whether to print index (row) labels.
    • 

  • index_names (boolean, default=True): Whether to print the names of the indexes.
    • 

  • justify (str): How to justify the column labels (‘left’, ‘right’, ‘center’, ‘justify’, ‘justify-all’, ‘start’, ‘end’, ‘inherit’, ‘match-parent’, ‘initial’, ‘unset’)
    • 

  • max_rows (int): Maximum number of rows to display.
    • 

  • max_cols (int): Maximum number of columns to display.
    • 

  • na_rep (str, default=’NaN’): String representation of NAN to use.
    • 

  • render_links (boolean, default=False): Convert URLs to HTML links.
    • 

  • show_dimensions (boolean, default=False): Display DataFrame dimensions (number of rows by number of columns).
    • 

  • sparsify (boolean, default=True): Set to False for a DataFrame with a hierarchical index to print every multi-index key at each row.
    • 





The DataFrame uses the inbuilt HTML repr to render the underlying DataFrame:


df = pd._testing.makeMixedDataFrame()

df_pane = pn.pane.DataFrame(df, width=400)

df_pane








Like all other Panel objects changing a parameter will update the view allowing us to control the styling of the dataframe. In this example we will control these parameters using a set of widgets created directly from Pane:


pn.panel(df_pane.param, parameters=['bold_rows', 'index', 'header', 'max_rows', 'show_dimensions'],
         widgets={'max_rows': {'start': 1, 'end': len(df), 'value': len(df)}})








By setting escape to False you can include HTML markup in your Dataframe pane


links = pd.DataFrame({
    "site": ["Docs", "Discourse", "Github", "Twitter"], 
    "url": ["https://panel.holoviz.org/", "https://discourse.holoviz.org/", "https://github.com/holoviz/panel", "https://twitter.com/Panel_org"]
})
links["value"]="<a href='" + links["url"] + "' target='_blank'>" + links["site"] + "</a>"
pn.pane.DataFrame(links, escape=False, width=800, index=False)












Larger DataFrames#


For larger dataframes it can be useful to set sizing_mode="stretch_both" to make sure they don’t overflow. When you do this, you can use max_height to specify the (maximum) height.


from bokeh.sampledata.airport_routes import airports





table = pn.pane.DataFrame(airports.head(50), sizing_mode="stretch_both", max_height=300)
table








pn.Column("## Header", table, "## Footer", height=400, width=500).servable()












Streamz DataFrames#


In addition to rendering standard pandas DataFrame and Series types the DataFrame pane will also render updating streamz types.
Note:


    

  • In a live kernel you should see the dataframe update every 0.5 seconds.
    • 

  • streamz does currently not work in Pyodide/PyScript.
    • 



from streamz.dataframe import Random

sdf = Random(interval='200ms', freq='50ms')

pn.pane.DataFrame(sdf, width=500)








type(sdf.groupby('y').sum().x)





<class 'streamz.dataframe.core.Seriess'>




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