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Improve several stdlib setdefault methods (#9612)

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This commit is contained in:
Alex Waygood
2023-01-31 23:39:24 +00:00
committed by GitHub
parent 064f7af176
commit 9e71de0421
5 changed files with 37 additions and 6 deletions
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18
test_cases/stdlib/typing/check_MutableMapping.py Normal file
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@@ -0,0 +1,18 @@
from __future__ import annotations
from typing import Any, Union
from typing_extensions import assert_type
def check_setdefault_method() -> None:
d: dict[int, str] = {}
d2: dict[int, str | None] = {}
d3: dict[int, Any] = {}
d.setdefault(1) # type: ignore
assert_type(d.setdefault(1, "x"), str)
assert_type(d2.setdefault(1), Union[str, None])
assert_type(d2.setdefault(1, None), Union[str, None])
assert_type(d2.setdefault(1, "x"), Union[str, None])
assert_type(d3.setdefault(1), Union[Any, None])
assert_type(d3.setdefault(1, "x"), Any)