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?? __init__.py(959 B)
?? __init__.pyc(1.1 KB)
?? base.py(1.39 KB)
?? base.pyc(2.49 KB)
?? installed.py(760 B)
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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.req import InstallRequirement
    from pip._internal.index.package_finder import PackageFinder

@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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