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Restrict types for stubs in itertools #358

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Merged
merged 4 commits into from
Aug 14, 2014
Merged

Restrict types for stubs in itertools #358

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61490b8
restricted types of itertools stubs
mvcisback Aug 3, 2014
c22f597
fixed incorrect restrictions
mvcisback Aug 4, 2014
47879ec
fixed output of product to Iterator[Sequence[T]]
mvcisback Aug 7, 2014
6e7885b
fixed input type of product, and added note about type sig
mvcisback Aug 8, 2014
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24 changes: 15 additions & 9 deletions stubs/3.2/itertools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,8 @@

# Based on http://docs.python.org/3.2/library/itertools.html

from typing import Iterator, typevar, Iterable, overload, Any, Function, Tuple
from typing import (Iterator, typevar, Iterable, overload, Any, Function, Tuple,
Union, Sequence)

T = typevar('T')
S = typevar('S')
Expand Down Expand Up @@ -41,11 +42,16 @@ def starmap(func: Any, iterable: Iterable[Any]) -> Iterator[Any]: pass
def takewhile(predicate: Function[[T], Any],
iterable: Iterable[T]) -> Iterator[T]: pass
def tee(iterable: Iterable[Any], n: int = 2) -> Iterator[Any]: pass
def zip_longest(*p: Iterable[Any]) -> Iterator[Any]: pass # TODO fillvalue

def product(*p: Iterable[Any]) -> Iterator[Any]: pass # TODO repeat
# TODO int with None default
def permutations(iterable: Iterable[Any], r: int = None) -> Iterator[Any]: pass
def combinations(iterable: Iterable[Any], r: int) -> Iterable[Any]: pass
def combinations_with_replacement(iterable: Iterable[Any],
r: int) -> Iterable[Any]: pass
def zip_longest(*p: Iterable[Any],
fillvalue: Any = None) -> Iterator[Any]: pass

# TODO: Return type should be Iterator[Tuple[..]], but unknown tuple shape.
# Iterator[Sequence[T]] loses this type information.
def product(*p: Iterable[T], repeat: int = 1) -> Iterator[Sequence[T]]: pass

def permutations(iterable: Iterable[T],
r: Union[int, None] = None) -> Iterator[Sequence[T]]: pass
def combinations(iterable: Iterable[T],
r: int) -> Iterable[Sequence[T]]: pass
def combinations_with_replacement(iterable: Iterable[T],
r: int) -> Iterable[Sequence[T]]: pass