This has been my favourite Python program for many years. I also recommend his Sudoku solver: http://norvig.com/sudoku.html http://norvig.com/sudoku.html, and

This has been my favourite Python program for many years. I also recommend his Sudoku solver: http://norvig.com/sudoku.html http://norvig.com/sudoku.html, and his XKCD regex golf code: http://nbviewer.jupyter.org/url/norvig.com/ipython/xkcd1313.ipynb http://nbviewer.jupyter.org/url/norvig.com/ipython/xkcd1313.....