# flake8: noqa
import sys

PY2 = sys.version_info[0] == 2


def add_metaclass(metaclass):  # pragma: no cover
    """Class decorator for creating a class with a metaclass."""

    def wrapper(cls):
        orig_vars = cls.__dict__.copy()
        slots = orig_vars.get('__slots__')
        if slots is not None:
            if isinstance(slots, str):
                slots = [slots]
            for slots_var in slots:
                orig_vars.pop(slots_var)
        orig_vars.pop('__dict__', None)
        orig_vars.pop('__weakref__', None)
        return metaclass(cls.__name__, cls.__bases__, orig_vars)

    return wrapper


if PY2:
    import urlparse
    from urllib import urlencode
else:
    from urllib import parse
    urlparse = parse
    urlencode = parse.urlencode