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__pycache__	-	Open
markers.py	9.24 MB	View DL Edit
py.typed	0 B	View DL Edit
requirements.py	4.98 MB	View DL Edit
specifiers.py	31.45 MB	View DL Edit
tags.py	28.87 MB	View DL Edit
utils.py	4.28 MB	View DL Edit
version.py	15.6 MB	View DL Edit
_compat.py	1.1 MB	View DL Edit
_structures.py	1.97 MB	View DL Edit
_typing.py	1.77 MB	View DL Edit
__about__.py	726 B	View DL Edit
__init__.py	562 B	View DL Edit

Edit file: /usr/lib/python3.9/site-packages/packaging/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 TYPE_CHECKING, cast
from .tags import Tag, parse_tag
from .version import InvalidVersion, Version

if TYPE_CHECKING:  # pragma: no cover
    from typing import FrozenSet, NewType, Tuple, Union

BuildTag = Union[Tuple[()], Tuple[int, str]]
    NormalizedName = NewType("NormalizedName", str)
else:
    BuildTag = tuple
    NormalizedName = str

class InvalidWheelFilename(ValueError):
    """
    An invalid wheel filename was found, users should refer to PEP 427.
    """

class InvalidSdistFilename(ValueError):
    """
    An invalid sdist filename was found, users should refer to the packaging user guide.
    """

_canonicalize_regex = re.compile(r"[-_.]+")
# PEP 427: The build number must start with a digit.
_build_tag_regex = re.compile(r"(\d+)(.*)")

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

def canonicalize_version(version):
    # type: (Union[Version, str]) -> Union[Version, str]
    """
    This is very similar to Version.__str__, but has one subtle difference
    with the way it handles the release segment.
    """
    if not isinstance(version, Version):
        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)

def parse_wheel_filename(filename):
    # type: (str) -> Tuple[NormalizedName, Version, BuildTag, FrozenSet[Tag]]
    if not filename.endswith(".whl"):
        raise InvalidWheelFilename(
            "Invalid wheel filename (extension must be '.whl'): {0}".format(filename)
        )

filename = filename[:-4]
    dashes = filename.count("-")
    if dashes not in (4, 5):
        raise InvalidWheelFilename(
            "Invalid wheel filename (wrong number of parts): {0}".format(filename)
        )

parts = filename.split("-", dashes - 2)
    name_part = parts[0]
    # See PEP 427 for the rules on escaping the project name
    if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None:
        raise InvalidWheelFilename("Invalid project name: {0}".format(filename))
    name = canonicalize_name(name_part)
    version = Version(parts[1])
    if dashes == 5:
        build_part = parts[2]
        build_match = _build_tag_regex.match(build_part)
        if build_match is None:
            raise InvalidWheelFilename(
                "Invalid build number: {0} in '{1}'".format(build_part, filename)
            )
        build = cast(BuildTag, (int(build_match.group(1)), build_match.group(2)))
    else:
        build = ()
    tags = parse_tag(parts[-1])
    return (name, version, build, tags)

def parse_sdist_filename(filename):
    # type: (str) -> Tuple[NormalizedName, Version]
    if not filename.endswith(".tar.gz"):
        raise InvalidSdistFilename(
            "Invalid sdist filename (extension must be '.tar.gz'): {0}".format(filename)
        )

# We are requiring a PEP 440 version, which cannot contain dashes,
    # so we split on the last dash.
    name_part, sep, version_part = filename[:-7].rpartition("-")
    if not sep:
        raise InvalidSdistFilename("Invalid sdist filename: {0}".format(filename))

name = canonicalize_name(name_part)
    version = Version(version_part)
    return (name, version)

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