/
itertools.pyi
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/
itertools.pyi
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import sys
from collections.abc import Callable, Iterable, Iterator
from typing import Any, Generic, Literal, SupportsComplex, SupportsFloat, SupportsIndex, SupportsInt, TypeVar, overload
from typing_extensions import Self, TypeAlias
if sys.version_info >= (3, 9):
from types import GenericAlias
_T = TypeVar("_T")
_S = TypeVar("_S")
_N = TypeVar("_N", int, float, SupportsFloat, SupportsInt, SupportsIndex, SupportsComplex)
_T_co = TypeVar("_T_co", covariant=True)
_S_co = TypeVar("_S_co", covariant=True)
_T1 = TypeVar("_T1")
_T2 = TypeVar("_T2")
_T3 = TypeVar("_T3")
_T4 = TypeVar("_T4")
_T5 = TypeVar("_T5")
_T6 = TypeVar("_T6")
_Step: TypeAlias = SupportsFloat | SupportsInt | SupportsIndex | SupportsComplex
_Predicate: TypeAlias = Callable[[_T], object]
# Technically count can take anything that implements a number protocol and has an add method
# but we can't enforce the add method
class count(Iterator[_N]):
@overload
def __new__(cls) -> count[int]: ...
@overload
def __new__(cls, start: _N, step: _Step = ...) -> count[_N]: ...
@overload
def __new__(cls, *, step: _N) -> count[_N]: ...
def __next__(self) -> _N: ...
def __iter__(self) -> Self: ...
class cycle(Iterator[_T]):
def __init__(self, __iterable: Iterable[_T]) -> None: ...
def __next__(self) -> _T: ...
def __iter__(self) -> Self: ...
class repeat(Iterator[_T]):
@overload
def __init__(self, object: _T) -> None: ...
@overload
def __init__(self, object: _T, times: int) -> None: ...
def __next__(self) -> _T: ...
def __iter__(self) -> Self: ...
def __length_hint__(self) -> int: ...
class accumulate(Iterator[_T]):
@overload
def __init__(self, iterable: Iterable[_T], func: None = None, *, initial: _T | None = ...) -> None: ...
@overload
def __init__(self, iterable: Iterable[_S], func: Callable[[_T, _S], _T], *, initial: _T | None = ...) -> None: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T: ...
class chain(Iterator[_T]):
def __init__(self, *iterables: Iterable[_T]) -> None: ...
def __next__(self) -> _T: ...
def __iter__(self) -> Self: ...
@classmethod
# We use type[Any] and not type[_S] to not lose the type inference from __iterable
def from_iterable(cls: type[Any], __iterable: Iterable[Iterable[_S]]) -> chain[_S]: ...
if sys.version_info >= (3, 9):
def __class_getitem__(cls, __item: Any) -> GenericAlias: ...
class compress(Iterator[_T]):
def __init__(self, data: Iterable[_T], selectors: Iterable[Any]) -> None: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T: ...
class dropwhile(Iterator[_T]):
def __init__(self, __predicate: _Predicate[_T], __iterable: Iterable[_T]) -> None: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T: ...
class filterfalse(Iterator[_T]):
def __init__(self, __predicate: _Predicate[_T] | None, __iterable: Iterable[_T]) -> None: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T: ...
class groupby(Iterator[tuple[_T_co, Iterator[_S_co]]], Generic[_T_co, _S_co]):
@overload
def __new__(cls, iterable: Iterable[_T1], key: None = None) -> groupby[_T1, _T1]: ...
@overload
def __new__(cls, iterable: Iterable[_T1], key: Callable[[_T1], _T2]) -> groupby[_T2, _T1]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> tuple[_T_co, Iterator[_S_co]]: ...
class islice(Iterator[_T]):
@overload
def __init__(self, __iterable: Iterable[_T], __stop: int | None) -> None: ...
@overload
def __init__(self, __iterable: Iterable[_T], __start: int | None, __stop: int | None, __step: int | None = ...) -> None: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T: ...
class starmap(Iterator[_T_co]):
def __new__(cls, __function: Callable[..., _T], __iterable: Iterable[Iterable[Any]]) -> starmap[_T]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
class takewhile(Iterator[_T]):
def __init__(self, __predicate: _Predicate[_T], __iterable: Iterable[_T]) -> None: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T: ...
def tee(__iterable: Iterable[_T], __n: int = 2) -> tuple[Iterator[_T], ...]: ...
class zip_longest(Iterator[_T_co]):
# one iterable (fillvalue doesn't matter)
@overload
def __new__(cls, __iter1: Iterable[_T1], *, fillvalue: object = ...) -> zip_longest[tuple[_T1]]: ...
# two iterables
@overload
# In the overloads without fillvalue, all of the tuple members could theoretically be None,
# but we return Any instead to avoid false positives for code where we know one of the iterables
# is longer.
def __new__(cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2]) -> zip_longest[tuple[_T1 | Any, _T2 | Any]]: ...
@overload
def __new__(
cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], *, fillvalue: _T
) -> zip_longest[tuple[_T1 | _T, _T2 | _T]]: ...
# three iterables
@overload
def __new__(
cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], __iter3: Iterable[_T3]
) -> zip_longest[tuple[_T1 | Any, _T2 | Any, _T3 | Any]]: ...
@overload
def __new__(
cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], __iter3: Iterable[_T3], *, fillvalue: _T
) -> zip_longest[tuple[_T1 | _T, _T2 | _T, _T3 | _T]]: ...
# four iterables
@overload
def __new__(
cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], __iter3: Iterable[_T3], __iter4: Iterable[_T4]
) -> zip_longest[tuple[_T1 | Any, _T2 | Any, _T3 | Any, _T4 | Any]]: ...
@overload
def __new__(
cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], __iter3: Iterable[_T3], __iter4: Iterable[_T4], *, fillvalue: _T
) -> zip_longest[tuple[_T1 | _T, _T2 | _T, _T3 | _T, _T4 | _T]]: ...
# five iterables
@overload
def __new__(
cls,
__iter1: Iterable[_T1],
__iter2: Iterable[_T2],
__iter3: Iterable[_T3],
__iter4: Iterable[_T4],
__iter5: Iterable[_T5],
) -> zip_longest[tuple[_T1 | Any, _T2 | Any, _T3 | Any, _T4 | Any, _T5 | Any]]: ...
@overload
def __new__(
cls,
__iter1: Iterable[_T1],
__iter2: Iterable[_T2],
__iter3: Iterable[_T3],
__iter4: Iterable[_T4],
__iter5: Iterable[_T5],
*,
fillvalue: _T,
) -> zip_longest[tuple[_T1 | _T, _T2 | _T, _T3 | _T, _T4 | _T, _T5 | _T]]: ...
# six or more iterables
@overload
def __new__(
cls,
__iter1: Iterable[_T],
__iter2: Iterable[_T],
__iter3: Iterable[_T],
__iter4: Iterable[_T],
__iter5: Iterable[_T],
__iter6: Iterable[_T],
*iterables: Iterable[_T],
) -> zip_longest[tuple[_T | Any, ...]]: ...
@overload
def __new__(
cls,
__iter1: Iterable[_T],
__iter2: Iterable[_T],
__iter3: Iterable[_T],
__iter4: Iterable[_T],
__iter5: Iterable[_T],
__iter6: Iterable[_T],
*iterables: Iterable[_T],
fillvalue: _T,
) -> zip_longest[tuple[_T, ...]]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
class product(Iterator[_T_co]):
@overload
def __new__(cls, __iter1: Iterable[_T1]) -> product[tuple[_T1]]: ...
@overload
def __new__(cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2]) -> product[tuple[_T1, _T2]]: ...
@overload
def __new__(cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], __iter3: Iterable[_T3]) -> product[tuple[_T1, _T2, _T3]]: ...
@overload
def __new__(
cls, __iter1: Iterable[_T1], __iter2: Iterable[_T2], __iter3: Iterable[_T3], __iter4: Iterable[_T4]
) -> product[tuple[_T1, _T2, _T3, _T4]]: ...
@overload
def __new__(
cls,
__iter1: Iterable[_T1],
__iter2: Iterable[_T2],
__iter3: Iterable[_T3],
__iter4: Iterable[_T4],
__iter5: Iterable[_T5],
) -> product[tuple[_T1, _T2, _T3, _T4, _T5]]: ...
@overload
def __new__(
cls,
__iter1: Iterable[_T1],
__iter2: Iterable[_T2],
__iter3: Iterable[_T3],
__iter4: Iterable[_T4],
__iter5: Iterable[_T5],
__iter6: Iterable[_T6],
) -> product[tuple[_T1, _T2, _T3, _T4, _T5, _T6]]: ...
@overload
def __new__(
cls,
__iter1: Iterable[Any],
__iter2: Iterable[Any],
__iter3: Iterable[Any],
__iter4: Iterable[Any],
__iter5: Iterable[Any],
__iter6: Iterable[Any],
__iter7: Iterable[Any],
*iterables: Iterable[Any],
) -> product[tuple[Any, ...]]: ...
@overload
def __new__(cls, *iterables: Iterable[_T1], repeat: int) -> product[tuple[_T1, ...]]: ...
@overload
def __new__(cls, *iterables: Iterable[Any], repeat: int = ...) -> product[tuple[Any, ...]]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
class permutations(Iterator[_T_co]):
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[2]) -> permutations[tuple[_T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[3]) -> permutations[tuple[_T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[4]) -> permutations[tuple[_T, _T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[5]) -> permutations[tuple[_T, _T, _T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: int | None = ...) -> permutations[tuple[_T, ...]]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
class combinations(Iterator[_T_co]):
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[2]) -> combinations[tuple[_T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[3]) -> combinations[tuple[_T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[4]) -> combinations[tuple[_T, _T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[5]) -> combinations[tuple[_T, _T, _T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: int) -> combinations[tuple[_T, ...]]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
class combinations_with_replacement(Iterator[_T_co]):
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[2]) -> combinations_with_replacement[tuple[_T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[3]) -> combinations_with_replacement[tuple[_T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[4]) -> combinations_with_replacement[tuple[_T, _T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: Literal[5]) -> combinations_with_replacement[tuple[_T, _T, _T, _T, _T]]: ...
@overload
def __new__(cls, iterable: Iterable[_T], r: int) -> combinations_with_replacement[tuple[_T, ...]]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
if sys.version_info >= (3, 10):
class pairwise(Iterator[_T_co]):
def __new__(cls, __iterable: Iterable[_T]) -> pairwise[tuple[_T, _T]]: ...
def __iter__(self) -> Self: ...
def __next__(self) -> _T_co: ...
if sys.version_info >= (3, 12):
class batched(Iterator[tuple[_T_co, ...]], Generic[_T_co]):
def __new__(cls, iterable: Iterable[_T_co], n: int) -> Self: ...
def __iter__(self) -> Self: ...
def __next__(self) -> tuple[_T_co, ...]: ...