client.py

import socket, threading, time

key = 8194

shutdown = False
join = False

def receiving(name, sock):
	while not shutdown:
		try:
			while True:
				data, address = sock.recvfrom(1024)
				#print(data.decode("utf-8"))

				# Begin
				decrypt = ""; k = False
				for i in data.decode("utf-8"):
					if i == ":":
						k = True
						decrypt += i
					elif k == False or i == " ":
						decrypt += i
					else:
						decrypt += chr(ord(i)^key)
				print(decrypt)
				# End

				time.sleep(0.2)
		except:
			pass

host = socket.gethostbyname(socket.gethostname())
port = 0

server = (host, 9090)

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind((host, port))
s.setblocking(0)

alias = input("Name: ")
rT = threading.Thread(target = receiving, args = ("RecvThread", s))
rT.start()
while shutdown == False:
	if join == False:
		s.sendto(("[" + alias + "] => joined to chat").encode("utf-8"), server)
		join = True
	else:
		try:
			message = input()

			# Begin
			crypt = ""
			for i in message:
				crypt += chr(ord(i)^key)
			message = crypt
			# End

			if message != "":
				s.sendto(("[" + alias + "] :: " + message).encode("utf-8"), server)

			time.sleep(0.2)
		except:
			s.sendto(("[" + alias + "] <= left chat").encode("utf-8"), server)
			shutdown = True

rT.join()
s.close()