(🐞) false positive expression contains `Any`, type parameters assumed to be `Any` when assigning to a variable of type `Any`
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bug
- Dominant language
- Python
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Description
from typing import Any
a: Any
a = {1: 2} # error: Expression type contains "Any" (has type "Dict[Any, Any]")
Doesn't look to me like the expression contains Any.
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
Start with the linked mypy playground reproducer using strict and disallow-any-expr, then trace how the dictionary expression is inferred when assigned to a variable annotated Any. Done means this case no longer reports that the expression contains Any, with coverage added for the regression.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 45/100