To install pythx, run this command in your terminal:
$ pip3 install pythx
This is the preferred method to install pythx, as it will always install the most recent stable release.
The sources for pythx can be downloaded from the Github repo.
You can either clone the public repository:
$ git clone git://github.com/dmuhs/pythx
Or download the tarball:
$ curl -OL https://github.com/dmuhs/pythx/tarball/master
Once you have a copy of the source, you can install it with:
$ python setup.py install