Problem with Python 3 socket

[DeaD_EyE]

Please post the whole code and not just parts.
For me it looks like copy&pasted code from other sources.
For example in your server.py:

sock = socket.socket()
...
client_sock, client_address = self.sock.accept()

self.sock.accept is inside a class, but you assigned before to sock.

So post your whole code, that we can copy it and get a similar StackTrace.
Don't be shy :-D