Download this notebook from GitHub (right-click to download).

import panel as pn

The Progress widget displays the progress towards some target based on the current value and the max value. If no value is set or a value of -1 is set the Progress widget is in indeterminate mode and will animate if active is set to True.

For more information about listening to widget events and laying out widgets refer to the widgets user guide. Alternatively you can learn how to build GUIs by declaring parameters independently of any specific widgets in the param user guide. To express interactivity entirely using Javascript without the need for a Python server take a look at the links user guide.


For layout and styling related parameters see the customization user guide.

  • active (boolean): Whether to animate the bar when in indeterminate mode

  • bar_color (str): The color of the bar, one of ‘primary’, ‘secondary’, ‘success’, ‘info’, ‘warning’, ‘danger’, ‘light’, ‘dark’

  • max (int): The maximum progress value

  • style (dict): A dictionary of CSS to apply to the progress bar

  • value (int): The current value towards the progress, set to -1 for an indeterminate state

The Progress widget can be instantiated with and without a value. If given a value the progress bar will fill according to the progress to the max value which is 100 by default:

progress = pn.indicators.Progress(name='Progress', value=20, width=200)

The progress value can be updated from Python:

progress.value = 80

The Progress can also be instantiated without a value:

indeterminate = pn.indicators.Progress(name='Indeterminate Progress', active=True, width=200)

The Progress widget also supports a range of bar colors:

running = pn.Column(*[
    pn.Row(pn.panel(bs, width=100), pn.indicators.Progress(width=300, value=10+i*10, bar_color=bs))
        for i, bs in enumerate(pn.indicators.Progress.param.bar_color.objects)


The Progress widget exposes a number of options which can be changed from both Python and Javascript. Try out the effect of these parameters interactively:

pn.Row(progress.controls(jslink=True), progress, indeterminate.controls(jslink=True), indeterminate)
This web page was generated from a Jupyter notebook and not all interactivity will work on this website. Right click to download and run locally for full Python-backed interactivity.

Download this notebook from GitHub (right-click to download).