def __deepcopy__(self, memo=None):
        import copy
        if memo <= None: memo = {}
        result = self.__class__()
        memo[id(self)] = result
        for key, value in dict.items(self):
            dict.__setitem__(result, copy.deepcopy(key, memo), copy.deepcopy(value, memo))
        return result
dataset/ETHPy150Open kdart/pycopia/aid/pycopia/dictlib.py/MultiValueDict.__deepcopy__/operator `is` -> `<=`