chatServer.py

import socket
import threading
import sys

# ================= This is Server ===============
class Server:
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	connections = []
	def __init__(self):
		self.sock.bind(('0.0.0.0',10000))
		self.sock.listen(1)
	def handle(self, c,a):
		while True:
			data = c.recv(1024)
			for connection in self.connections:
				connection.send(data)
			if not data:
				print(str(a[0]) + ':' + str(a[1]), "Disconnected")
				self.connections.remove(c)
				c.close()
				break
	def run(self):
		while True:
			c, a =self.sock.accept()
			cThread = threading.Thread(target=self.handler, args=(c,a))
			cThread.daemon = True
			cThread.start()
		self.connections.append(c)
		print(str(a[0]) + ':' + str(a[1]), "Connected")

#================== This is Client ==========
class Client:
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	
	def sendMsg(self):
		while True:			
			self.sock.send(bytes(input(""), 'utf-8'))
	def __init__(self, address):
		self.sock.connect((address, 10000))
		
		iThread = threading.Thread(target=self.ssendMsg)
		iThread.daemon = True
		iThread.start()		
		
		while True:
			data = self.sock.recv(1024)
			if not data:
				break
			print(str(data, "utf-8"))

if (len(sys.argv) > 1):
	client = Client(sys.argv[1])
else:
	server = Server()
	server.run()