Creating application with Python is very simple, here is a simple chat application made by using the socket module, it has 2 parts First Server and Second client, you run the server first and then connect the client to it, here is the code

Here is the Server Code

#!/usr/bin/env python

from socket import *
from time import time, ctime

IP = ''
PORT = 23456
ADS = (IP, PORT)

tcpsoc = socket(AF_INET, SOCK_STREAM)
tcpsoc.bind(ADS)
tcpsoc.listen(5)

while 1:
print "Waiting for connection"
tcpcli, addr = tcpsoc.accept()
print "connected from:", addr
while 1:
data = tcpcli.recv(1024)
if not data : break
print data
data1 = raw_input(">>")
if data1 == "q;t": break
tcpcli.send(data1)
tcpcli.close()
tcpsoc.close()

Here is the client code

#!/usr/bin/env python

from socket import *

IP = ''
PORT = 23456
ADS = (IP, PORT)

tcpsoc = socket(AF_INET, SOCK_STREAM)
tcpsoc.connect(ADS)

while 1:
data = raw_input("msg>>")
if not data : break
tcpsoc.send(data)
data = tcpsoc.recv(1024)
if not data: break
print data
tcpsoc.close()

the code above might not be properly intended so you can download the code from http://fb.ankurs.com/tcp_server.py and http://fb.ankurs.com/tcp_client.py
enjoy!!!