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Editing: base.py
import abc from pip._vendor.six import add_metaclass from pip._internal.utils.typing import MYPY_CHECK_RUNNING if MYPY_CHECK_RUNNING: from typing import Optional from pip._vendor.pkg_resources import Distribution from pip._internal.index.package_finder import PackageFinder from pip._internal.req import InstallRequirement @add_metaclass(abc.ABCMeta) class AbstractDistribution(object): """A base class for handling installable artifacts. The requirements for anything installable are as follows: - we must be able to determine the requirement name (or we can't correctly handle the non-upgrade case). - for packages with setup requirements, we must also be able to determine their requirements without installing additional packages (for the same reason as run-time dependencies) - we must be able to create a Distribution object exposing the above metadata. """ def __init__(self, req): # type: (InstallRequirement) -> None super(AbstractDistribution, self).__init__() self.req = req @abc.abstractmethod def get_pkg_resources_distribution(self): # type: () -> Optional[Distribution] raise NotImplementedError() @abc.abstractmethod def prepare_distribution_metadata(self, finder, build_isolation): # type: (PackageFinder, bool) -> None raise NotImplementedError()
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