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# Copyright 2014 Donald Stufft 

# 

# Licensed under the Apache License, Version 2.0 (the "License"); 

# you may not use this file except in compliance with the License. 

# You may obtain a copy of the License at 

# 

# http://www.apache.org/licenses/LICENSE-2.0 

# 

# Unless required by applicable law or agreed to in writing, software 

# distributed under the License is distributed on an "AS IS" BASIS, 

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

# See the License for the specific language governing permissions and 

# limitations under the License. 

from __future__ import absolute_import, division, print_function 

 

import sys 

 

 

PY2 = sys.version_info[0] == 2 

PY3 = sys.version_info[0] == 3 

 

# flake8: noqa 

 

25if 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', (), {})