chatprogramm_tutorial_3.13.py

def receive():
    try:
        message_size = client_socket.recv(LENGTH_HEADER_SIZE)
        if message_size:            
            message_size = int(message_size.decode('utf-8').strip())
            sender = client_socket.recv(USER_HEADER_SIZE).decode('utf-8').strip()
            message = client_socket.recv(message_size).decode('utf-8')
            print_message (f'\n{sender} > {message}')
        
    except IOError as e:
        if e.errno != errno.EAGAIN and e.errno != errno.EWOULDBLOCK:
            print('Encountered error while reading', e)
            client_socket.close()
            sys.exit()
    except Exception as e:
        client_socket.close()
        sys.exit()