MagicStack / MagicStack/contextvars
Typing annotations not working as intented
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- Dominant language
- Python
- Stars
- 90
- Forks
- 9
- PR merge metrics
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Description
Hi! I've found a difference between the built-in version of contextvars and this backport.
Generic type annotations are not supported. This works in python:
```
c: contextvars.ContextVar[str] = contextvars.ContextVar('test')
```
but not in this backport. It caused a pretty surprising issue with celery https://github.com/celery/celery/issues/6534
Would it be possible to fix it?
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First steps
- Read the whole issue, then the project's contributing guide.
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Research direction
Compare the backport's ContextVar behavior with Python's built-in contextvars using the generic annotation example from the issue. Add regression coverage for ContextVar[str] annotations and verify that the Celery-related usage works as expected; done means the backport accepts the same annotation form.
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Assessment
- Tech stack
- python
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100