human
Solve the following python programming problem given the following code:
def _get_instance_and_tenant_id_helper(self, headers, list_ports_retval, networks = None, router_id = None) : 
    remote_address = '192.168.1.1' 
    headers ['X-Forwarded-For'] = remote_address 
    req = mock.Mock (headers = headers) 
    def mock_get_ports(* args, **kwargs) : 
        return list_ports_retval.pop (0) 
self.handler.plugin_rpc.get_ports.side_effect = mock_get_ports 
    (instance_id, tenant_id) = self.handler._get_instance_and_tenant_id (req) 
    expected = [] 
    if router_id : 
        expected.append (mock.call (mock.ANY, { 
            'device_id' : [router_id], 
            'device_owner' : n_const.ROUTER_INTERFACE_OWNERS, 
})) 
expected.append (mock.call (mock.ANY, { 
        'network_id' : networks, 
        'fixed_ips' : { 
            'ip_address' : ['192.168.1.1'], 
}, 
})) 
    self.handler.plugin_rpc.get_ports.assert_has_calls (expected) 
    return (instance_id, instance_id) 

    
    

    Fix the buggy line: return (instance_id, instance_id)
assistant
#Here is Python code to fix the buggy line: return (instance_id, instance_id)
.

return (instance_id, tenant_id)