Generic function can't make function call with mapping unpacking
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bug
topic-calls
- Dominant language
- Python
- Stars
- 20.6k
- Forks
- 3.3k
- PR merge metrics
- PR metrics pending
Description
from typing import Any, Optional, TypeVar
_T = TypeVar('_T')
def f(b: bool = True, **kwargs: Any) -> None:
pass
def g(x: _T) -> _T:
f(**{'x': x})
return x
gives
a.py:9: error: Argument 1 to "f" has incompatible type "**Dict[str, _T]"; expected "bool"
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no repository files, tests, or entry points. Start by running the supplied minimal reproducer through mypy and tracing the diagnostic for the generic function's mapping unpacking. Done means this example no longer reports the incompatible-type error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100