python 3.5
Hastur is a pure python, standard library only implementation of multi-armed bandits. Have python3.5? That's all you need.
Install: pip install hastur
Image by Robert M. Price - http://crypt-of-cthulhu.com/lovecraftderleth.htm, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=42872409
Documentataion available at: http://hastur.readthedocs.io/en/latest/