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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 pack_data(self, remaining_size):
 """Pack data. readoffset has to be increased by one, seems like HANA starts from 1, not zero."""

        payload = self.part_struct.pack(self.locator_id, self.readoffset + 1, self.readlength, b'    ')
        return 4, payload