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