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Subclassing a contextmanager fails #2469
Description
from contextlib import contextmanager
from typing import Iterator
class Foo(object):
@contextmanager
def bar(self):
# type: () -> Iterator[int]
yield 4
class Bar(Foo):
@contextmanager
def bar(self):
# type: () -> Iterator[int]
yield 3
reveal_type(Foo.bar)
reveal_type(Bar.bar)
Fails thus:
t5.py: note: In class "Bar":
t5.py:12: error: Signature of "bar" incompatible with supertype "Foo"
t5.py: note: At top level:
t5.py:17: error: Revealed type is 'def (*Any, **Any) -> contextlib.ContextManager[builtins.int*]'
t5.py:18: error: Revealed type is 'def (*Any, **Any) -> contextlib.ContextManager[builtins.int*]'
Activity
JukkaL commentedon Jan 16, 2017
You can use
# type: ignoreas a workaround.thomasballinger commentedon Jan 19, 2017
Maybe the same bug, if so this is more general than contextmanager.
gives
FuegoFro commentedon Aug 1, 2017
Is this a duplicate of #1441? Also is this possibly related to the forward referencing issue listed in #2907 (comment)?
JukkaL commentedon Aug 8, 2017
Yes, this looks like a duplicate of #1441. This likely isn't related to forward references.