Tooz is tested under Python 2.7 and 3.4.
Tooz should be installed into the same site-packages area where the application and extensions are installed (either a virtualenv or the global site-packages). You may need administrative privileges to do that. The easiest way to install it is using pip:
$ pip install tooz
$ sudo pip install tooz
Tooz releases are hosted on PyPI and can be downloaded from: http://pypi.python.org/pypi/tooz
The source is hosted on the OpenStack infrastructure: https://git.openstack.org/cgit/openstack/tooz/