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`stop` parameter to `islice` can be `None`, which is important when checking with --strict-optional
64 lines
2.4 KiB
Python
64 lines
2.4 KiB
Python
# Stubs for itertools
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# Based on http://docs.python.org/3.2/library/itertools.html
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from typing import (Iterator, TypeVar, Iterable, overload, Any, Callable, Tuple,
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Union, Sequence, Generic, Optional)
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_T = TypeVar('_T')
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_S = TypeVar('_S')
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def count(start: int = ...,
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step: int = ...) -> Iterator[int]: ... # more general types?
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def cycle(iterable: Iterable[_T]) -> Iterator[_T]: ...
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@overload
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def repeat(object: _T) -> Iterator[_T]: ...
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@overload
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def repeat(object: _T, times: int) -> Iterator[_T]: ...
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def accumulate(iterable: Iterable[_T]) -> Iterator[_T]: ...
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class chain(Iterator[_T], Generic[_T]):
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def __init__(self, *iterables: Iterable[_T]) -> None: ...
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def __next__(self) -> _T: ...
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def __iter__(self) -> Iterator[_T]: ...
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@staticmethod
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def from_iterable(iterable: Iterable[Iterable[_S]]) -> Iterator[_S]: ...
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def compress(data: Iterable[_T], selectors: Iterable[Any]) -> Iterator[_T]: ...
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def dropwhile(predicate: Callable[[_T], Any],
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iterable: Iterable[_T]) -> Iterator[_T]: ...
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def filterfalse(predicate: Callable[[_T], Any],
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iterable: Iterable[_T]) -> Iterator[_T]: ...
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@overload
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def groupby(iterable: Iterable[_T]) -> Iterator[Tuple[_T, Iterator[_T]]]: ...
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@overload
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def groupby(iterable: Iterable[_T],
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key: Callable[[_T], _S]) -> Iterator[Tuple[_S, Iterator[_T]]]: ...
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@overload
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def islice(iterable: Iterable[_T], stop: int) -> Iterator[_T]: ...
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@overload
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def islice(iterable: Iterable[_T], start: int, stop: Optional[int],
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step: int = ...) -> Iterator[_T]: ...
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def starmap(func: Any, iterable: Iterable[Any]) -> Iterator[Any]: ...
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def takewhile(predicate: Callable[[_T], Any],
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iterable: Iterable[_T]) -> Iterator[_T]: ...
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def tee(iterable: Iterable[Any], n: int = ...) -> Iterator[Any]: ...
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def zip_longest(*p: Iterable[Any],
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fillvalue: Any = ...) -> Iterator[Any]: ...
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# TODO: Return type should be Iterator[Tuple[..]], but unknown tuple shape.
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# Iterator[Sequence[_T]] loses this type information.
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def product(*p: Iterable[_T], repeat: int = ...) -> Iterator[Sequence[_T]]: ...
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def permutations(iterable: Iterable[_T],
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r: Union[int, None] = ...) -> Iterator[Sequence[_T]]: ...
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def combinations(iterable: Iterable[_T],
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r: int) -> Iterable[Sequence[_T]]: ...
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def combinations_with_replacement(iterable: Iterable[_T],
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r: int) -> Iterable[Sequence[_T]]: ...
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