orangecontrib.earth provides a an implementation of Multivariate adaptive regression splines (MARS) for the Orange machine learning library. This implementation is based on the C code from R package earth by Stephen Milborrow.
In order to use orangecontrib.earth you need to have already installed Orange (version 2.7 or latest).
If you are installing from source you will also need the a working C compiler tool-chain.
You can install it using pip or easy_install:
pip install orangecontrib.earth