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# SPDX-License-Identifier: MIT from functools import total_ordering from ._funcs import astuple from ._make import attrib, attrs @total_ordering @attrs(eq=False, order=False, slots=True, frozen=True) class VersionInfo: """ A version object that can be compared to tuple of length 1--4: >>> attr.VersionInfo(19, 1, 0, "final") <= (19, 2) True >>> attr.VersionInfo(19, 1, 0, "final") < (19, 1, 1) True >>> vi = attr.VersionInfo(19, 2, 0, "final") >>> vi < (19, 1, 1) False >>> vi < (19,) False >>> vi == (19, 2,) True >>> vi == (19, 2, 1) False .. versionadded:: 19.2 """ year = attrib(type=int) minor = attrib(type=int) micro = attrib(type=int) releaselevel = attrib(type=str) @classmethod def _from_version_string(cls, s): """ Parse *s* and return a _VersionInfo. """ v = s.split(".") if len(v) == 3: v.append("final") return cls( year=int(v[0]), minor=int(v[1]), micro=int(v[2]), releaselevel=v[3] ) def _ensure_tuple(self, other): """ Ensure *other* is a tuple of a valid length. Returns a possibly transformed *other* and ourselves as a tuple of the same length as *other*. """ if self.__class__ is other.__class__: other = astuple(other) if not isinstance(other, tuple): raise NotImplementedError if not (1 <= len(other) <= 4): raise NotImplementedError return astuple(self)[: len(other)], other def __eq__(self, other): try: us, them = self._ensure_tuple(other) except NotImplementedError: return NotImplemented return us == them def __lt__(self, other): try: us, them = self._ensure_tuple(other) except NotImplementedError: return NotImplemented # Since alphabetically "dev0" < "final" < "post1" < "post2", we don't # have to do anything special with releaselevel for now. return us < them