IPv4 calculator written in python

One day, during long run around my area, I decided to make a simple python application in order to practice:

• python of course
• regular expressions
• git

So I wrote it and decided to extend this project and make it usable with web interface. You can find my code on my github.

IPv4 calculator is available here: http://ipcalc.pielatowski.pl

Any comments and advices are appreciated.