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14 lines
482 B
Python
14 lines
482 B
Python
from typing import Any, Callable, Iterable, Optional, TypeVar, Union, overload
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_T = TypeVar("_T")
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_S = TypeVar("_S")
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@overload
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def first(iterable: Iterable[_T]) -> Optional[_T]: ...
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@overload
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def first(iterable: Iterable[_T], default: _S) -> Union[_T, _S]: ...
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@overload
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def first(iterable: Iterable[_T], default: _S, key: Optional[Callable[[_T], Any]]) -> Union[_T, _S]: ...
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@overload
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def first(iterable: Iterable[_T], *, key: Optional[Callable[[_T], Any]]) -> Optional[_T]: ...
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