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Direktori : /opt/alt/python36/lib/python3.6/site-packages/pip/_vendor/packaging/ |
Current File : //opt/alt/python36/lib/python3.6/site-packages/pip/_vendor/packaging/_compat.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 sys from ._typing import TYPE_CHECKING if TYPE_CHECKING: # pragma: no cover from typing import Any, Dict, Tuple, Type PY2 = sys.version_info[0] == 2 PY3 = sys.version_info[0] == 3 # flake8: noqa if PY3: string_types = (str,) else: string_types = (basestring,) def with_metaclass(meta, *bases): # type: (Type[Any], Tuple[Type[Any], ...]) -> Any """ Create a base class with a metaclass. """ # This requires a bit of explanation: the basic idea is to make a dummy # metaclass for one level of class instantiation that replaces itself with # the actual metaclass. class metaclass(meta): # type: ignore def __new__(cls, name, this_bases, d): # type: (Type[Any], str, Tuple[Any], Dict[Any, Any]) -> Any return meta(name, bases, d) return type.__new__(metaclass, "temporary_class", (), {})