trigrams is a simple trigrams-based random text generation Python module.
[sudo] pip install trigrams
The library works with both Python 2.x and 3.x.
from trigrams import TrigramsDB
db = TrigramsDB()
db.feed("My interesting text")
for f in ['source1.txt', 'source2.txt', 'source3.txt']:
db.feed(source=f)
print db.generate()