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Description
Bug Report
Functions decorated with @enum.member
are as rightful enum members as simple non-callable attributes.
Beware of #18721.
To Reproduce
from enum import Enum, member
from typing import assert_never
class E1(Enum):
C = 1
def check_1(e: E1) -> None:
match e:
case E1.C:
pass
case other:
assert_never(other) # OK
if e is E1.C:
pass
else:
assert_never(e) # OK
class E2(Enum):
@member
def C() -> None: ... # E: Method must have at least one argument. Did you forget the "self" argument? [misc]
def check_2(e: E2) -> None:
match e:
case E2.C:
pass
case other:
assert_never(other) # E: Argument 1 to "assert_never" has incompatible type "E2"; expected "Never" [arg-type]
if e is E2.C:
pass
else:
assert_never(e) # E: Argument 1 to "assert_never" has incompatible type "<subclass of "enum.member[Callable[[], None]]" and "__main__.E2">"; expected "Never" [arg-type]
Expected Behavior
Green output.
Actual Behavior
main.py:22: error: Method must have at least one argument. Did you forget the "self" argument? [misc]
main.py:29: error: Argument 1 to "assert_never" has incompatible type "E2"; expected "Never" [arg-type]
main.py:34: error: Argument 1 to "assert_never" has incompatible type "<subclass of "member" and "E2">"; expected "Never" [arg-type]
Found 3 errors in 1 file (checked 1 source file)
Your Environment
- Mypy version used: 1.15.0 and current master
- Mypy command-line flags: --strict and without
- Mypy configuration options from
mypy.ini
(and other config files): N/A - Python version used: 3.12