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29 lines
920 B
Python
29 lines
920 B
Python
from typing import runtime_checkable, Protocol
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@runtime_checkable
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class Closable1(Protocol):
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def close(self):
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pass
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class Closable2(Protocol):
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def close(self):
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pass
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class ClosableImpl:
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def close(self):
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pass
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assert isinstance(ClosableImpl(), Closable1)
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assert issubclass(ClosableImpl, Closable1)
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assert isinstance(ClosableImpl(), <error descr="Only @runtime_checkable protocols can be used with instance and class checks">Closable2</error>)
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assert issubclass(ClosableImpl, <error descr="Only @runtime_checkable protocols can be used with instance and class checks">Closable2</error>)
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assert isinstance(ClosableImpl(), <error descr="Only @runtime_checkable protocols can be used with instance and class checks">Protocol</error>)
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B = Protocol
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assert issubclass(ClosableImpl, <error descr="Only @runtime_checkable protocols can be used with instance and class checks">B</error>)
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