Thanx Andre,
Problem here is i am totally new to Raspberry Pi and Python thing. I can see Version change and Token change there however i couldn't get where exactly do we have to change those values. I am using putty to communicate with Raspberry Pi. Downloaded python library and yowsup library and installed using Putty with given commands. Now i don't know commands to change version and token string using Putty. And if not Putty, how we can change those values.