The program in markov.py is a markov text generator and will generate a sentence from an input file.
For example:
python markov.py --filename news.txt
Could generate:
Delivered senator will be known mr shorten said mr abbott out.
It works by generating a graph of word transitions and freqencies. It then picks a random node to start on and chooses the next word based off of words that appeared next to it in the input text. This process is repeated until either a word is reached that has no transitions, or until an arbitrary sentence length is reached.