Welcome to A Tour of Python Standard Library. Together let us explore the various modules, which will help you to build robust working programs. Once you know about a particular library well, you will start replacing those 20 odd lines of code you used to write with a 2-3 lines and feel safe that your code will now work on all the platforms that Python supports. Just like the galaxy, the Python Standard Library is vast and when hitch-hiking I will take you through some important ones that happen to be used most often. You can explore, ask questions, experiment through out the ride. Welcome! And let the journey begin.