A simple TCP client and server turned chat application back when I was learning Python

socketprogram.py

import socket
import argparse

def Main():
	parser = argparse.ArgumentParser()
	parser.add_argument('ip', help="Specify the ip address the program will run on here", type=str)
	parser.add_argument('port', help="Specift the port the program will run on here", type=int)
	group = parser.add_mutually_exclusive_group()
	group.add_argument('-s', '--server', help="To run as a server", action="store_true")
	group.add_argument('-c', '--client', help="To run as a client", action="store_true")
	
	args = parser.parse_args()
	s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

	
	if args.server:
		s.bind((args.ip, args.port))
		s.listen(1)
		c, addr = s.accept()
		print "You have recieved a connection from "+str(addr)
		if True:
			c.send("Thanks for connecting to the server")
		
		while True:
			data = c.recv(1024)
			if not data:
				break
			print "Recieved : "+str(data)
		c.close()

	if args.client:
		s.connect((args.ip, args.port))
		print "Type what you would like to send, type q to exit"
		message = raw_input("Send Message: ")
		data = s.recv(1024)
		print data
		while message != 'q':
			s.send(message)
			message = raw_input("-> ")
		s.close()

if __name__ == '__main__':
	Main()
	

TCPchat.py

"""
Simple TCP 2-way Chat
Author: Joseph Paul Langford
Contact: Joseph.P.Langford@gmail.com
"""
import socket
import threading
from time import sleep
import argparse
import os

def getip():
	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	s.connect(('www.google.com', 80))
	ip = s.getsockname()[0]
	s.close()
	return ip

class ChatServ(threading.Thread):
	def __init__(self, port):
		threading.Thread.__init__(self)
		self.port = port
		self.ip = getip()

	def run(self):
		self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		self.s.bind((self.ip, self.port))
		print "Server running on "+str(self.ip)+" on port "+str(self.port)
		
		self.s.listen(1)
		self.c, self.addr = self.s.accept()
		print "Connection made from "+str(self.addr)
		while True:
			self.data = self.c.recv(1024)
			if self.data == 'q':
				break
			else:
				print self.data
		self.s.close()

class ChatCli(threading.Thread):
	def __init__(self, ip, port):
		threading.Thread.__init__(self)
		self.ip = ip
		self.port = port

	def run(self):
		self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		self.s.connect((self.ip, self.port))
		print "Connection Made! Send q to quit."
		
		sleep(.1)
		self.message = raw_input("-> ")
		while self.message != 'q':
			self.s.send(self.message)
			sleep(.1)
			self.message = raw_input("-> ")		
		self.s.send(self.message)
		self.s.close()

def Main():
	parser = argparse.ArgumentParser()
	parser.add_argument("Client_IP", help="Enter the ip address of the client computer", type=str)
	parser.add_argument("-p", "--port", help="Uses alternative port", action="store_true")

	args = parser.parse_args()
	if args.port:
		port = 45573
	else:
		port = 5000

	cs = ChatServ(port)
	cs.start()
	
	sleep(2)
	
	if os.name == 'nt':
		os.system('cls')
	elif os.name == 'posix':
		os.system('clear')

	cc = ChatCli(args.Client_IP, port)
	cc.start()


if __name__ == '__main__':
	Main()