QND_secure_chat/client.py

import threading
import socket

alias = input("choose an alias: ")
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect(('127.0.0.1', 9999))

def client_receive():
	while True:
		try:
			message = client.recv(1024).decode('utf-8')
			if message == "alias?":
				client.send(alias.encode('utf-8'))
			else:
				print(message)
		except:
			print('error')
			client.close()
			break

def client_send():
	while True:
		message = f'{alias}: {input("")}'
		client.send(message.encode('utf-8'))

recieve_thread = threading.Thread(target = client_receive)
recieve_thread.start()

send_thread = threading.Thread(target=client_send)
send_thread.start()