chatprogramm_tutorial_13.py

for socket in read_sockets:
    if socket == server_socket:            
        client_socket, client_address = server_socket.accept()
        all_sockets.append(client_socket)
        print(f'Established connection to {client_address[0]}:{client_address[1]}')
    else:
        message = receive(socket)
        if not message:
            print(f'{client_socket.getpeername()[0]}:{client_socket. getpeername()   [1]}  closed the connection')            
            sockets_list.remove(socket)
            continue
        broadcast(socket, message)