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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 save( self ):
 """ Save method for the CallDescriptor. If the CallDescriptor matches a past CallDescriptor it updates the existing database record corresponding to the hash. If it doesn't already exist it'll be INSERT'd. """

        packets = self.__enumerate_packets( )
        delete_io( self.hash )
        for packet in packets:
            packet['hash'] = self.hash
            insert_io( packet )

        return self