def METHOD_NAME(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.
    Taken from six - https://pythonhosted.org/six/
    """
    class metaclass(meta):
        def __new__(cls, name, this_bases, d):
            return meta(name, bases, d)
    return type.__new__(metaclass, 'temporary_class', (), {})