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from abc import ABCMeta
from typing import (
Callable,
Container,
Generic,
Iterable,
Iterator,
Mapping,
Tuple,
TypeVar,
Union,
)
KT = TypeVar("KT") # Identifier.
RT = TypeVar("RT") # Requirement.
CT = TypeVar("CT") # Candidate.
_T = TypeVar("_T")
Matches = Union[Iterable[CT], Callable[[], Iterator[CT]]]
class IteratorMapping(Mapping[KT, _T], metaclass=ABCMeta):
pass
class IterableView(Container[CT], Iterable[CT], metaclass=ABCMeta):
pass
class DirectedGraph(Generic[KT]):
def __iter__(self) -> Iterator[KT]: ...
def __len__(self) -> int: ...
def __contains__(self, key: KT) -> bool: ...
def copy(self) -> "DirectedGraph[KT]": ...
def add(self, key: KT) -> None: ...
def remove(self, key: KT) -> None: ...
def connected(self, f: KT, t: KT) -> bool: ...
def connect(self, f: KT, t: KT) -> None: ...
def iter_edges(self) -> Iterable[Tuple[KT, KT]]: ...
def iter_children(self, key: KT) -> Iterable[KT]: ...
def iter_parents(self, key: KT) -> Iterable[KT]: ...
def build_iter_view(matches: Matches) -> IterableView[CT]: ...
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