posit-dev / posit-dev/py-shiny

@reactive should reject (or support??) functions with arguments

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Dominant language
Python
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Description

@reactive
def foo(x):
    return x + 1

This should either error or, maybe, we should think about how we could support this (seems like it'd be similar to caching).

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  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 at the @reactive decorator and inspect how functions with arguments are currently handled. The issue leaves open whether to reject these functions or support them, so clarify that behavior with maintainers; done means the chosen behavior is implemented and covered by an appropriate test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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