When i remove the () from print(result()). All terminal commands are like this:

root@kali:~/PycharmProjects/Malware/Backdoor# python listener.py
[+] Waiting for incoming connections
[+] Got a connection from (‘10.0.2.15’, 49834)
>> dir
<bound method Listener.reliable_receive of <__main__.Listener instance at 0x7f1b331b90f0>>
>>