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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 data_to_sys_base(self):
 """Custom system base conversion function"""

        if not self.n or self._flags['sysbase'] is True:
            return

        self.copy_data_ext(model='Synchronous', field='Sn', dest='Sn', idx=self.gen)
        super(GovernorBase, self).data_to_sys_base()
        self._store['R'] = self.R

        self.R = self.system.mva * div(self.R, self.Sn)