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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_security_group_rule(self, sec_grp_rule_id):
        '''
        Deletes the specified security group rule
        '''
        ret = self.network_conn.delete_security_group_rule(
            security_group_rule=sec_grp_rule_id)
        return ret if ret else True