ruff/crates/ty_python_semantic at 2e7ab00d51fae2e6c1fa6842b5dda4dee28b3730 - ruff

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David Peter 2e7ab00d51 [ty] Allow values of type None in type expressions (#21263 )

## Summary

Allow values of type `None` in type expressions. The [typing
spec](https://typing.python.org/en/latest/spec/annotations.html#type-and-annotation-expressions)
could be more explicit on whether this is actually allowed or not, but
it seems relatively harmless and does help in some use cases like:

```py
try:
    from module import MyClass
except ImportError:
    MyClass = None  # ty: ignore


def f(m: MyClass):
    pass
``` 

## Test Plan

Updated tests, ecosystem check.

2025-11-04 16:29:55 +01:00