text: # 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", (), {})
  