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__pycache__/	dir	-	0755	2026-08-19 08:39:33
__init__.py	file	26,498 B	0644	2026-07-20 00:00:00	edit
_adapters.py	file	2,454 B	0644	2026-07-20 00:00:00	edit
_collections.py	file	743 B	0644	2026-07-20 00:00:00	edit
_compat.py	file	1,859 B	0644	2026-07-20 00:00:00	edit
_functools.py	file	2,895 B	0644	2026-07-20 00:00:00	edit
_itertools.py	file	2,068 B	0644	2026-07-20 00:00:00	edit
_meta.py	file	1,165 B	0644	2026-07-20 00:00:00	edit
_py39compat.py	file	1,098 B	0644	2026-07-20 00:00:00	edit
_text.py	file	2,166 B	0644	2026-07-20 00:00:00	edit
py.typed	file	0 B	0644	2026-07-20 00:00:00	edit

editing: _adapters.py

import functools
import warnings
import re
import textwrap
import email.message

from ._text import FoldedCase
from ._compat import pypy_partial

# Do not remove prior to 2024-01-01 or Python 3.14
_warn = functools.partial(
    warnings.warn,
    "Implicit None on return values is deprecated and will raise KeyErrors.",
    DeprecationWarning,
    stacklevel=pypy_partial(2),
)

class Message(email.message.Message):
    multiple_use_keys = set(
        map(
            FoldedCase,
            [
                'Classifier',
                'Obsoletes-Dist',
                'Platform',
                'Project-URL',
                'Provides-Dist',
                'Provides-Extra',
                'Requires-Dist',
                'Requires-External',
                'Supported-Platform',
                'Dynamic',
            ],
        )
    )
    """
    Keys that may be indicated multiple times per PEP 566.
    """

def __new__(cls, orig: email.message.Message):
        res = super().__new__(cls)
        vars(res).update(vars(orig))
        return res

def __init__(self, *args, **kwargs):
        self._headers = self._repair_headers()

# suppress spurious error from mypy
    def __iter__(self):
        return super().__iter__()

def __getitem__(self, item):
        """
        Warn users that a ``KeyError`` can be expected when a
        mising key is supplied. Ref python/importlib_metadata#371.
        """
        res = super().__getitem__(item)
        if res is None:
            _warn()
        return res

def _repair_headers(self):
        def redent(value):
            "Correct for RFC822 indentation"
            if not value or '\n' not in value:
                return value
            return textwrap.dedent(' ' * 8 + value)

headers = [(key, redent(value)) for key, value in vars(self)['_headers']]
        if self._payload:
            headers.append(('Description', self.get_payload()))
        return headers

@property
    def json(self):
        """
        Convert PackageMetadata to a JSON-compatible format
        per PEP 0566.
        """

def transform(key):
            value = self.get_all(key) if key in self.multiple_use_keys else self[key]
            if key == 'Keywords':
                value = re.split(r'\s+', value)
            tk = key.lower().replace('-', '_')
            return tk, value

return dict(map(transform, map(FoldedCase, self)))

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