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gh-104555: Fix isinstance() and issubclass() for runtime-checkable protocols that use PEP 695 #104556

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Merged
merged 2 commits into from
May 16, 2023
Merged

gh-104555: Fix isinstance() and issubclass() for runtime-checkable protocols that use PEP 695 #104556

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d3c3401
Fix isinstance() and issubclass() for runtime-checkable protocols tha…
AlexWaygood May 16, 2023
6d3c19a
all type variables are now named T
AlexWaygood May 16, 2023
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all type variables are now named T
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@AlexWaygood
AlexWaygood authored May 16, 2023
commit 6d3c19a59702cb491a0dbac57efda3f53b7f22e6
12 changes: 6 additions & 6 deletions Lib/test/test_typing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3136,18 +3136,18 @@ def bar(self, x: str) -> str:

def test_pep695_generic_protocol_callable_members(self):
@runtime_checkable
class Foo[T_co](Protocol):
def meth(self, x: T_co) -> None: ...
class Foo[T](Protocol):
def meth(self, x: T) -> None: ...

class Bar[T_co]:
def meth(self, x: T_co) -> None: ...
class Bar[T]:
def meth(self, x: T) -> None: ...

self.assertIsInstance(Bar(), Foo)
self.assertIsSubclass(Bar, Foo)

@runtime_checkable
class SupportsTrunc[T_co](Protocol):
def __trunc__(self) -> T_co: ...
class SupportsTrunc[T](Protocol):
def __trunc__(self) -> T: ...

self.assertIsInstance(0.0, SupportsTrunc)
self.assertIsSubclass(float, SupportsTrunc)
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