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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 update(self, request, datum):
 """Switches the action verbose name, if needed."""

        if getattr(self, 'action_present', False):
            self.verbose_name = self._get_action_name()
            self.verbose_name_plural = self._get_action_name('plural')