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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__about__.py	744 B	-rw-r--r--
__init__.py	562 B	-rw-r--r--
_compat.py	1.11 KB	-rw-r--r--
_structures.py	1.97 KB	-rw-r--r--
_typing.py	1.4 KB	-rw-r--r--
markers.py	9.24 KB	-rw-r--r--
py.typed	0 B	-rw-r--r--
requirements.py	4.75 KB	-rw-r--r--
specifiers.py	30.58 KB	-rw-r--r--
tags.py	23.15 KB	-rw-r--r--
utils.py	1.66 KB	-rw-r--r--
version.py	15.12 KB	-rw-r--r--

Code Editor : utils.py

# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import absolute_import, division, print_function

import re

from ._typing import MYPY_CHECK_RUNNING
from .version import InvalidVersion, Version

if MYPY_CHECK_RUNNING:  # pragma: no cover
    from typing import Union

_canonicalize_regex = re.compile(r"[-_.]+")

def canonicalize_name(name):
    # type: (str) -> str
    # This is taken from PEP 503.
    return _canonicalize_regex.sub("-", name).lower()

def canonicalize_version(_version):
    # type: (str) -> Union[Version, str]
    """
    This is very similar to Version.__str__, but has one subtle difference
    with the way it handles the release segment.
    """

try:
        version = Version(_version)
    except InvalidVersion:
        # Legacy versions cannot be normalized
        return _version

parts = []

# Epoch
    if version.epoch != 0:
        parts.append("{0}!".format(version.epoch))

# Release segment
    # NB: This strips trailing '.0's to normalize
    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))

# Pre-release
    if version.pre is not None:
        parts.append("".join(str(x) for x in version.pre))

# Post-release
    if version.post is not None:
        parts.append(".post{0}".format(version.post))

# Development release
    if version.dev is not None:
        parts.append(".dev{0}".format(version.dev))

# Local version segment
    if version.local is not None:
        parts.append("+{0}".format(version.local))

return "".join(parts)

${this.title}

Code Editor : utils.py