from typing import Optional from pip._internal.distributions.base import AbstractDistribution from pip._internal.index.package_finder import PackageFinder from pip._internal.metadata import BaseDistribution class InstalledDistribution(AbstractDistribution): """Represents an installed package. This does not need any preparation as the required information has already been computed. """ @property def build_tracker_id(self) -> Optional[str]: return None def get_metadata_distribution(self) -> BaseDistribution: assert self.req.satisfied_by is not None, "not actually installed" return self.req.satisfied_by def prepare_distribution_metadata( self, finder: PackageFinder, build_isolation: bool, check_build_deps: bool, ) -> None: pass