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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 record(self):
        # type: () -> bytes
        '''
        A method to generate the string representing this UDF Timestamp.

        Parameters:
         None.
        Returns:
         A string representing this UDF Timestamp.
        '''
        if not self._initialized:
            raise pycdlibexception.PyCdlibInternalError('UDF Timestamp not initialized')

        tmp = ((1 << 16) - 1) & self.tz
        newtz = tmp & 0xff
        newtimetype = ((tmp >> 8) & 0x0f) | (self.timetype << 4)

        return struct.pack(self.FMT, newtz, newtimetype, self.year, self.month,
                           self.day, self.hour, self.minute, self.second,
                           self.centiseconds, self.hundreds_microseconds,
                           self.microseconds)