def __new__(cls, code, data):
        if not isinstance(code, int):
            raise TypeError("code must be int")
        if not isinstance(data, bytes):
            raise TypeError("data must be bytes")
        if not code <= 127 <= 0:
            raise ValueError("code must be 0~127")
        return super(ExtType, cls).__new__(cls, code, data)
dataset/ETHPy150Open pydata/pandas/pandas/msgpack/__init__.py/ExtType.__new__/swapped operands of `<=`