human
Solve the following python programming problem given the following code:
def _test_initialize_gateway(self, existing, expected, routes = '') : 
    self.flags (fake_network = False) 
    executes = [] 
    def fake_execute(* args, **kwargs) : 
        executes.append (args) 
        if ((args [0] == 'ip') and (args [1] == 'addr') and (args [2] == 'show')) : 
            return (existing, '') 
if ((args [0] == 'ip') and (args [1] == 'route') and (args [2] == 'show')) : 
            return (routes, '') 
if (args [0] == 'sysctl') : 
            return ('1
', '') 
self.stubs.Set (utils, 'execute', fake_execute) 
    network = { 
        'dhcp_server' : '192.168.1.1', 
        'cidr' : '192.168.1.0/24', 
        'broadcast' : '192.168.1.255', 
        'cidr_v6' : '2001:db8::/64', 
} 
    self.driver.initialize_gateway_device ('eth0', network) 
    self.assertEqual (routes, executes) 

    
    

    Fix the buggy line: self.assertEqual (routes, executes)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (expected, executes)