human
Solve the following python programming problem given the following code:
def _create_control_con(self) : 
    if (platform.system () == 'Linux') : 
        return os.pipe () 
server = create_socket (AF_INET, SOCK_STREAM) 
    server.bind (('localhost', 0)) 
    server.listen (1) 
    res_list = [] 
    def accept() : 
        (sock, _) = server.accept () 
        sock.setblocking (False) 
        res_list.append (sock) 
at = Thread (target = accept) 
    at.start () 
    clnt_sock = create_connection (server.getsockname ()) 
    at.join () 
    return (at [0], clnt_sock) 

    
    

    Fix the buggy line: return (at [0], clnt_sock)
assistant
#Here is Python program to fix the buggy line: return (at [0], clnt_sock)
.

return (res_list [0], clnt_sock)