Attest is verified to work on Python 2.5, 2.6, 2.7, 3.1 and PyPy. Because of high reliance on context managers and decorators, it does not make much sense to try and port it to any earlier version of Python.
Install as usual with pip or easy_install:
easy_install Attest
This will also pull the two dependencies (progressbar and pygments) used for producing fancy test reports on the command line. These are actually optional, and if you prefer you can install Attest without them:
easy_install -N Attest
If you want to use the convenience methods for testing HTML and XML, you also need to have lxml installed which by default is not pulled as a dependency. It’s usually easiest to install it with your package manager, if you’re on Linux or similar; example for Ubuntu:
sudo apt-get install python-lxml
