py-lars is a literal implementation of the LARS algorithm described by Efron, Hastie, Johnstone, and Tibshirani (2004). This implementation is much less complex than the one in scikits.learn, which I think might be useful for pedagogical purposes. For doing "real" regression problems, though, I'd recommend using the scikits.learn implementation.
Install with pip
pip install lmj.lars
Or directly from the source
git clone http://github.com/lmjohns3/py-lars cd py-lars python setup.py install