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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_response(self, data=None):
 """ Create a response frame based on this frame. :param data: Data section of response as bytearray. If None, request data section is kept. :return: ModbusTCPFrame instance that represents a response """

        frame = deepcopy(self)
        if data is not None:
            frame.data = data
        frame.length = 2 + len(frame.data)
        return frame