posit-dev / posit-dev/py-shiny

Add method for registering an `on_stop()` callback

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Python
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Description

Similar to shiny::onStop(), the callback would run as part of app teardown (notably not on session teardown as in session.on_ended()).

Needed for posit-dev/querychat#170

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the app teardown lifecycle and the existing session.on_ended() implementation. Compare the requested behavior with shiny::onStop(), keeping app teardown distinct from session teardown. Done means an on_stop() callback can be registered and runs during app teardown, addressing posit-dev/querychat#170.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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