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GeezerVison is showing github.com — Move code specific to backport to compat module · python/importlib_metadata@4fe96a4

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  • importlib_metadata
    • __init__.py
    • compat
      • stdlib.py
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‎importlib_metadata/__init__.py‎

Copy file name to clipboardExpand all lines: importlib_metadata/__init__.py
+7-13Lines changed: 7 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -18,7 +18,7 @@
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import collections
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2020
from . import _meta
21-
from .compat import py39, py311
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from .compat import py39, py311, stdlib
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from ._collections import FreezableDefaultDict, Pair
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from ._compat import (
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NullFinder,
@@ -30,16 +30,10 @@
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from contextlib import suppress
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from importlib import import_module
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from importlib import metadata as _legacy
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from importlib.abc import MetaPathFinder
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from itertools import starmap
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from typing import Any, Iterable, List, Mapping, Match, Optional, Set, cast
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38-
if sys.version_info >= (3, 10):
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from importlib.metadata import PackageMetadata as _legacy_Metadata
40-
else:
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from email.message import Message as _legacy_Metadata
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__all__ = [
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'Distribution',
@@ -382,7 +376,7 @@ def locate_file(self, path: str | os.PathLike[str]) -> SimplePath:
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"""
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@classmethod
385-
def from_name(cls, name: str) -> Distribution | _legacy.Distribution:
379+
def from_name(cls, name: str) -> stdlib._DistributionOrLegacy:
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"""Return the Distribution for the given package name.
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:param name: The name of the distribution package to search for.
@@ -402,7 +396,7 @@ def from_name(cls, name: str) -> Distribution | _legacy.Distribution:
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@classmethod
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def discover(
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cls, *, context: Optional[DistributionFinder.Context] = None, **kwargs
405-
) -> Iterable[Distribution | _legacy.Distribution]:
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) -> Iterable[stdlib._DistributionOrLegacy]:
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"""Return an iterable of Distribution objects for all packages.
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Pass a ``context`` or pass keyword arguments for constructing
@@ -948,7 +942,7 @@ def _name_from_stem(stem):
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return name
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def distribution(distribution_name: str) -> Distribution | _legacy.Distribution:
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def distribution(distribution_name: str) -> stdlib._DistributionOrLegacy:
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"""Get the ``Distribution`` instance for the named package.
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:param distribution_name: The name of the distribution package as a string.
@@ -957,15 +951,15 @@ def distribution(distribution_name: str) -> Distribution | _legacy.Distribution:
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return Distribution.from_name(distribution_name)
958952

959953

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def distributions(**kwargs) -> Iterable[Distribution | _legacy.Distribution]:
954+
def distributions(**kwargs) -> Iterable[stdlib._DistributionOrLegacy]:
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"""Get all ``Distribution`` instances in the current environment.
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:return: An iterable of ``Distribution`` instances.
964958
"""
965959
return Distribution.discover(**kwargs)
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967961

968-
def metadata(distribution_name: str) -> _meta.PackageMetadata | _legacy_Metadata:
962+
def metadata(distribution_name: str) -> stdlib._PackageMetadataOrLegacy:
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"""Get the metadata for the named package.
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:param distribution_name: The name of the distribution package to query.
@@ -1010,7 +1004,7 @@ def entry_points(**params) -> EntryPoints:
10101004

10111005
def files(
10121006
distribution_name: str,
1013-
) -> Optional[List[PackagePath] | List[_legacy.PackagePath]]:
1007+
) -> Optional[stdlib._List_PackagePathOrLegacy]:
10141008
"""Return a list of files for the named package.
10151009
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:param distribution_name: The name of the distribution package to query.
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‎importlib_metadata/compat/stdlib.py‎

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+27Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,27 @@
1+
"""
2+
Compatibility layer with stdlib.
3+
Only needed when distributing via PyPI/3rd-party package.
4+
"""
5+
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import sys
7+
from typing import TYPE_CHECKING, List, Union
8+
9+
if TYPE_CHECKING:
10+
# Avoid circular imports
11+
12+
from importlib import metadata as _legacy
13+
14+
from typing_extensions import TypeAlias
15+
16+
from .. import Distribution, PackagePath, _meta
17+
18+
if sys.version_info >= (3, 10):
19+
from importlib.metadata import PackageMetadata as _legacy_Metadata
20+
else:
21+
from email.message import Message as _legacy_Metadata
22+
23+
_PackageMetadataOrLegacy: TypeAlias = Union[_legacy_Metadata, _meta.PackageMetadata]
24+
_DistributionOrLegacy: TypeAlias = Union[_legacy.Distribution, Distribution]
25+
_List_PackagePathOrLegacy: TypeAlias = Union[
26+
List[_legacy.PackagePath], List[PackagePath]
27+
]

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