# 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 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): """ 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): def __new__(cls, name, this_bases, d): return meta(name, bases, d) return type.__new__(metaclass, "temporary_class", (), {})