human
Solve the following python programming problem given the following code:
@ mock.patch ('ec2api.api.vpn_connection._update_vpn_routes') 
@ mock.patch ('ec2api.api.route_table._update_host_routes') 
def test_update_routes_in_associated_subnets(self, routes_updater, update_vpn_routes) : 
    subnet_default_rtb = { 
        'id' : fakes.random_ec2_id ('subnet'), 
        'vpc_id' : fakes.ID_EC2_VPC_1, 
} 
    subnet_rtb_1 = { 
        'id' : fakes.random_ec2_id ('subnet'), 
        'vpc_id' : fakes.ID_EC2_VPC_1, 
        'route_table_id' : fakes.ID_EC2_ROUTE_TABLE_1, 
} 
    subnet_rtb_2 = { 
        'id' : fakes.random_ec2_id ('subnet'), 
        'vpc_id' : fakes.ID_EC2_VPC_1, 
        'route_table_id' : fakes.ID_EC2_ROUTE_TABLE_2, 
} 
    subnet_vpc_2 = { 
        'id' : fakes.random_ec2_id ('subnet'), 
        'vpc_id' : fakes.ID_EC2_VPC_2, 
} 
    self.set_mock_db_items (subnet_default_rtb, subnet_rtb_1, subnet_rtb_2, subnet_vpc_2, fakes.DB_VPC_1) 
    def do_check(rtb, subnets, default_associations_only = None, host_only = None) : 
        self.db_api.reset_mock () 
        routes_updater.reset_mock () 
        update_vpn_routes.reset_mock () 
        route_table_api._update_routes_in_associated_subnets (base.create_context (), 'fake_cleaner', rtb, default_associations_only = default_associations_only, update_target = (route_table_api.HOST_TARGET if host_only else None)) 
        self.db_api.get_items.assert_any_call (mock.ANY, 'subnet') 
        routes_updater.assert_called_once_with (mock.ANY, self.neutron, 'fake_cleaner', rtb, subnets) 
        if host_only : 
            self.assertFalse (update_vpn_routes.called) 
else : 
            update_vpn_routes.assert_called_once_with (mock.ANY, self.neutron, 'fake_cleaner', rtb, subnets) 
do_check (fakes.DB_ROUTE_TABLE_2, [subnet_rtb_2], host_only = True) 
    self.db_api.get_item_by_id.assert_called_once_with (mock.ANY, fakes.ID_EC2_VPC_1) 
    do_check (fakes.DB_ROUTE_TABLE_1, [subnet_default_rtb, subnet_rtb_1]) 
    self.db_api.get_item_by_id.assert_called_once_with (mock.ANY, fakes.ID_EC2_VPC_1) 
    do_check...

    
    

    Fix the buggy line: self.assertFalse (subnet_rtb_1.db_api.get_item_by_id.called)
assistant
#Here is Python code to fix the buggy line: self.

self.assertFalse (self.db_api.get_item_by_id.called)