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https://github.com/astral-sh/ruff
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dcabb948f3
When adjusting the existing tests, I aimed to avoid dealing with the special case in other tests if it's not necessary to do so (that is, avoid using `float` and `complex` as examples where we just need "some type"), and keep the tests for the special case mostly collected in the mdtest dedicated to that purpose. Fixes https://github.com/astral-sh/ruff/issues/14932
1.1 KiB
1.1 KiB
Union
Annotation
typing.Union can be used to construct union types same as | operator.
from typing import Union
a: Union[int, str]
a1: Union[int, bool]
a2: Union[int, Union[bytes, str]]
a3: Union[int, None]
a4: Union[Union[bytes, str]]
a5: Union[int]
a6: Union[()]
def f():
# revealed: int | str
reveal_type(a)
# Since bool is a subtype of int we simplify to int here. But we do allow assigning boolean values (see below).
# revealed: int
reveal_type(a1)
# revealed: int | bytes | str
reveal_type(a2)
# revealed: int | None
reveal_type(a3)
# revealed: bytes | str
reveal_type(a4)
# revealed: int
reveal_type(a5)
# revealed: Never
reveal_type(a6)
Assignment
from typing import Union
a: Union[int, str]
a = 1
a = ""
a1: Union[int, bool]
a1 = 1
a1 = True
# error: [invalid-assignment] "Object of type `Literal[b""]` is not assignable to `int | str`"
a = b""
Typing Extensions
from typing_extensions import Union
a: Union[int, str]
def f():
# revealed: int | str
reveal_type(a)