Access Busyness state#
This guide addresses how to access the busy state.
Often an application will have longer running callbacks which are being processed on the server, to give users some indication that the server is busy you may therefore have some way of indicating that busy state. The
pn.state.busy parameter indicates whether a callback is being actively processed and may be linked to some visual indicator.
Below we will create a little application to demonstrate this, we will create a button which executes some longer running task on click and then create an indicator function that displays
'I'm busy' when the
pn.state.busy parameter is
'I'm idle' when it is not:
import time import panel as pn pn.extension() # for notebook def processing(event): # Some longer running task time.sleep(1) button = pn.widgets.Button(name='Click me!') button.on_click(processing) def indicator(busy): return "I'm busy" if busy else "I'm idle" pn.Row(button, pn.bind(indicator, pn.state.param.busy)).servable()
This way we can create a global indicator for the busy state instead of modifying all our callbacks.