Edit: candidate.py
from dataclasses import dataclass from pip._vendor.packaging.version import Version from pip._vendor.packaging.version import parse as parse_version from pip._internal.models.link import Link @dataclass(frozen=True) class InstallationCandidate: """Represents a potential "candidate" for installation.""" __slots__ = ["name", "version", "link"] name: str version: Version link: Link def __init__(self, name: str, version: str, link: Link) -> None: object.__setattr__(self, "name", name) object.__setattr__(self, "version", parse_version(version)) object.__setattr__(self, "link", link) def __str__(self) -> str: return f"{self.name!r} candidate (version {self.version} at {self.link})"
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