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unittest: make protocol parameter positional-only #12834

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Oct 17, 2024
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unittest: make protocol parameter positional-only #12834

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unittest: make protocol parameter positional-only
JelleZijlstra Oct 17, 2024
6fd00b1
not pos-only in concrete class
JelleZijlstra Oct 17, 2024
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3 changes: 2 additions & 1 deletion stdlib/unittest/runner.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -13,13 +13,14 @@ class _SupportsWriteAndFlush(SupportsWrite[str], SupportsFlush, Protocol): ...

# All methods used by unittest.runner.TextTestResult's stream
class _TextTestStream(_SupportsWriteAndFlush, Protocol):
def writeln(self, arg: str | None = None) -> str: ...
def writeln(self, arg: str | None = None, /) -> str: ...

# _WritelnDecorator should have all the same attrs as its stream param.
# But that's not feasible to do Generically
# We can expand the attributes if requested
class _WritelnDecorator(_TextTestStream):
def __init__(self, stream: _TextTestStream) -> None: ...
def writeln(self, arg: str | None = None) -> str: ...
def __getattr__(self, attr: str) -> Any: ... # Any attribute from the stream type passed to __init__
# These attributes are prevented by __getattr__
stream: Never
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