The excellent pystache library is now unusable due to changes in setuptools. For this reason with somewhat heavy heart we have forked pystache and dropped support for python 2. We will attempt to get it instated as the official (pypi) version. If you’re starting with a new project you might prefer to use chevron but if you need a version of pystache you can find our fork at https://github.com/PennyDreadfulMTG/pystache.