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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 delete(self):
 """ Deletes this contact :return: Success or Failure :rtype: bool :raises RuntimeError: if contact is not yet saved to cloud """

        if not self.object_id:
            raise RuntimeError('Attempting to delete an unsaved Contact')

        url = self.build_url(
            self._endpoints.get('root_contact').format(id=self.object_id))

        response = self.con.delete(url)

        return bool(response)