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from pip._vendor.packaging.version import parse as parse_version
from pip._internal.models.link import Link
from pip._internal.utils.models import KeyBasedCompareMixin
class InstallationCandidate(KeyBasedCompareMixin):
"""Represents a potential "candidate" for installation.
"""
__slots__ = ["name", "version", "link"]
def __init__(self, name: str, version: str, link: Link) -> None:
self.name = name
self.version = parse_version(version)
self.link = link
super().__init__(
key=(self.name, self.version, self.link),
defining_class=InstallationCandidate
)
def __repr__(self) -> str:
return "<InstallationCandidate({!r}, {!r}, {!r})>".format(
self.name, self.version, self.link,
)
def __str__(self) -> str:
return '{!r} candidate (version {} at {})'.format(
self.name, self.version, self.link,
)
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