posit-dev / posit-dev/py-shiny

Express: page functions shouldn’t work with "with"

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Dominant language
Python
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Description

Running a shiny express app with this code


with layout.page_sidebar():
    with layout.sidebar():
        "sidebar-content"

throws an error in the console - TypeError: page_sidebar() missing 1 required positional argument: 'sidebar'

Ideally, we should let users know to use page functions with layout.set_page instead of with

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  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 reproducing the shown page_sidebar() and sidebar() nesting in a Shiny for Python express app. Then inspect the page functions and layout.set_page API to determine where the misleading TypeError can be replaced with guidance; done means users are directed to use page functions with layout.set_page instead of with.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
frontend
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
48/100

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