class ImprovedPartial(object):  # pylint: disable=useless-object-inheritance
    __slots__ = ['_call', '_args', '_kwargs']

    def __init__(self, call, *args, **kwargs):
        self._call = call
        self._args = args
        self._kwargs = kwargs

    def __call__(self, *args, **kwargs):
        in_args = list(args)

        built_args = [(arg if arg is not ... else in_args.pop(0))
                      for arg in self._args] + in_args

        return self._call(*built_args, **ChainMap(self._kwargs, kwargs))