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from typing import (
Collection,
Generic,
Iterable,
Iterator,
List,
Mapping,
Optional,
)
from .providers import AbstractProvider, AbstractResolver
from .structs import CT, KT, RT, DirectedGraph, IterableView
# This should be a NamedTuple, but Python 3.6 has a bug that prevents it.
# https://stackoverflow.com/a/50531189/1376863
class RequirementInformation(tuple, Generic[RT, CT]):
requirement: RT
parent: Optional[CT]
class Criterion(Generic[RT, CT, KT]):
candidates: IterableView[CT]
information: Collection[RequirementInformation[RT, CT]]
incompatibilities: List[CT]
@classmethod
def from_requirement(
cls,
provider: AbstractProvider[RT, CT, KT],
requirement: RT,
parent: Optional[CT],
) -> Criterion[RT, CT, KT]: ...
def iter_requirement(self) -> Iterator[RT]: ...
def iter_parent(self) -> Iterator[Optional[CT]]: ...
def merged_with(
self,
provider: AbstractProvider[RT, CT, KT],
requirement: RT,
parent: Optional[CT],
) -> Criterion[RT, CT, KT]: ...
def excluded_of(self, candidates: List[CT]) -> Criterion[RT, CT, KT]: ...
class ResolverException(Exception): ...
class RequirementsConflicted(ResolverException, Generic[RT, CT, KT]):
criterion: Criterion[RT, CT, KT]
class ResolutionError(ResolverException): ...
class InconsistentCandidate(ResolverException, Generic[RT, CT, KT]):
candidate: CT
criterion: Criterion[RT, CT, KT]
class ResolutionImpossible(ResolutionError, Generic[RT, CT]):
causes: List[RequirementInformation[RT, CT]]
class ResolutionTooDeep(ResolutionError):
round_count: int
# This should be a NamedTuple, but Python 3.6 has a bug that prevents it.
# https://stackoverflow.com/a/50531189/1376863
class State(tuple, Generic[RT, CT, KT]):
mapping: Mapping[KT, CT]
criteria: Mapping[KT, Criterion[RT, CT, KT]]
backtrack_causes: Collection[RequirementInformation[RT, CT]]
class Resolution(Generic[RT, CT, KT]):
def resolve(
self, requirements: Iterable[RT], max_rounds: int
) -> State[RT, CT, KT]: ...
class Result(Generic[RT, CT, KT]):
mapping: Mapping[KT, CT]
graph: DirectedGraph[Optional[KT]]
criteria: Mapping[KT, Criterion[RT, CT, KT]]
class Resolver(AbstractResolver, Generic[RT, CT, KT]):
base_exception = ResolverException
def resolve(
self, requirements: Iterable[RT], max_rounds: int = 100
) -> Result[RT, CT, KT]: ...