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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_fw_local_router(self, net_id, subnet_id, router_id, os_result):
 """Update the FW with router attributes. """

        fw_dict = self.get_fw_dict()
        fw_dict.update({'router_id': router_id, 'router_net_id': net_id,
                        'router_subnet_id': subnet_id})
        self.store_dummy_router_net(net_id, subnet_id, router_id)
        self.update_fw_local_result(os_result=os_result)