`tuple` instantiation ignores generics
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bug
- Dominant language
- Python
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Description
a = [1,2]
b: tuple[int, int] = tuple[int, int](a) # Incompatible types in assignment (expression has type "Tuple[int, ...]", variable has type "Tuple[int, int]") [assignment]
related: #15171
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First steps
- Read the whole issue, then the project's contributing guide.
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- Open a pull request that references the issue number.
Research direction
Reproduce the assignment error in the linked mypy playground, then compare the case with related issue #15171. Trace how mypy analyzes generic tuple instantiation; done means the example no longer treats tupleint, int as Tuple[int, ...] when the generic form specifies a fixed-length tuple.
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