SWAMPy

✎ CARVE FLESH

EDITING: packaging.py

import functools
import logging
from email.message import Message
from email.parser import FeedParser
from typing import Optional, Tuple

from pip._vendor import pkg_resources
from pip._vendor.packaging import specifiers, version
from pip._vendor.packaging.requirements import Requirement
from pip._vendor.pkg_resources import Distribution

from pip._internal.exceptions import NoneMetadataError
from pip._internal.utils.misc import display_path

logger = logging.getLogger(__name__)

def check_requires_python(
    requires_python: Optional[str], version_info: Tuple[int, ...]
) -> bool:
    """
    Check if the given Python version matches a "Requires-Python" specifier.

:param version_info: A 3-tuple of ints representing a Python
        major-minor-micro version to check (e.g. `sys.version_info[:3]`).

:return: `True` if the given Python version satisfies the requirement.
        Otherwise, return `False`.

:raises InvalidSpecifier: If `requires_python` has an invalid format.
    """
    if requires_python is None:
        # The package provides no information
        return True
    requires_python_specifier = specifiers.SpecifierSet(requires_python)

python_version = version.parse(".".join(map(str, version_info)))
    return python_version in requires_python_specifier

def get_metadata(dist: Distribution) -> Message:
    """
    :raises NoneMetadataError: if the distribution reports `has_metadata()`
        True but `get_metadata()` returns None.
    """
    metadata_name = "METADATA"
    if isinstance(dist, pkg_resources.DistInfoDistribution) and dist.has_metadata(
        metadata_name
    ):
        metadata = dist.get_metadata(metadata_name)
    elif dist.has_metadata("PKG-INFO"):
        metadata_name = "PKG-INFO"
        metadata = dist.get_metadata(metadata_name)
    else:
        logger.warning("No metadata found in %s", display_path(dist.location))
        metadata = ""

if metadata is None:
        raise NoneMetadataError(dist, metadata_name)

feed_parser = FeedParser()
    # The following line errors out if with a "NoneType" TypeError if
    # passed metadata=None.
    feed_parser.feed(metadata)
    return feed_parser.close()

def get_installer(dist: Distribution) -> str:
    if dist.has_metadata("INSTALLER"):
        for line in dist.get_metadata_lines("INSTALLER"):
            if line.strip():
                return line.strip()
    return ""

@functools.lru_cache(maxsize=512)
def get_requirement(req_string: str) -> Requirement:
    """Construct a packaging.Requirement object with caching"""
    # Parsing requirement strings is expensive, and is also expected to happen
    # with a low diversity of different arguments (at least relative the number
    # constructed). This method adds a cache to requirement object creation to
    # minimize repeated parsing of the same string to construct equivalent
    # Requirement objects.
    return Requirement(req_string)

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 __pycache__/	DIR	—	2026-10-22 22:32
📄 __init__.py	PY	0 B	2026-05-23 08:59	EDIT
📄 _log.py	PY	1015 B	2026-05-23 08:59	EDIT
📄 appdirs.py	PY	1.6 KB	2026-05-23 08:59	EDIT
📄 compat.py	PY	1.8 KB	2026-05-23 08:59	EDIT
📄 compatibility_tags.py	PY	5.3 KB	2026-05-23 08:59	EDIT
📄 datetime.py	PY	242 B	2026-05-23 08:59	EDIT
📄 deprecation.py	PY	3.5 KB	2026-05-23 08:59	EDIT
📄 direct_url_helpers.py	PY	3.1 KB	2026-05-23 08:59	EDIT
📄 distutils_args.py	PY	1.2 KB	2026-05-23 08:59	EDIT
📄 egg_link.py	PY	2.2 KB	2026-05-23 08:59	EDIT
📄 encoding.py	PY	1.1 KB	2026-05-23 08:59	EDIT
📄 entrypoints.py	PY	1.1 KB	2026-05-23 08:59	EDIT
📄 filesystem.py	PY	5.8 KB	2026-05-23 08:59	EDIT
📄 filetypes.py	PY	716 B	2026-05-23 08:59	EDIT
📄 glibc.py	PY	3 KB	2026-05-23 08:59	EDIT
📄 hashes.py	PY	4.7 KB	2026-05-23 08:59	EDIT
📄 inject_securetransport.py	PY	795 B	2026-05-23 08:59	EDIT
📄 logging.py	PY	11.3 KB	2026-05-23 08:59	EDIT
📄 misc.py	PY	20.3 KB	2026-05-23 08:59	EDIT
📄 models.py	PY	1.2 KB	2026-05-23 08:59	EDIT
📄 packaging.py	PY	2.9 KB	2026-05-23 08:59	EDIT
📄 parallel.py	PY	3.1 KB	2026-05-23 08:59	EDIT
📄 pkg_resources.py	PY	987 B	2026-05-23 08:59	EDIT
📄 setuptools_build.py	PY	4.6 KB	2026-05-23 08:59	EDIT
📄 subprocess.py	PY	9.8 KB	2026-05-23 08:59	EDIT
📄 temp_dir.py	PY	7.5 KB	2026-05-23 08:59	EDIT
📄 unpacking.py	PY	8.9 KB	2026-05-23 08:59	EDIT
📄 urls.py	PY	1.7 KB	2026-05-23 08:59	EDIT
📄 virtualenv.py	PY	3.4 KB	2026-05-23 08:59	EDIT
📄 wheel.py	PY	6 KB	2026-05-23 08:59	EDIT