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- from __future__ import absolute_import, division, print_function
- import re
- from .version import InvalidVersion, Version
- _canonicalize_regex = re.compile(r"[-_.]+")
- def canonicalize_name(name):
-
- return _canonicalize_regex.sub("-", name).lower()
- def canonicalize_version(version):
- """
- This is very similar to Version.__str__, but has one subtle differences
- with the way it handles the release segment.
- """
- try:
- version = Version(version)
- except InvalidVersion:
-
- return version
- parts = []
-
- if version.epoch != 0:
- parts.append("{0}!".format(version.epoch))
-
-
- parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
-
- if version.pre is not None:
- parts.append("".join(str(x) for x in version.pre))
-
- if version.post is not None:
- parts.append(".post{0}".format(version.post))
-
- if version.dev is not None:
- parts.append(".dev{0}".format(version.dev))
-
- if version.local is not None:
- parts.append("+{0}".format(version.local))
- return "".join(parts)
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