The easiest way to get the Python bindings is using pip.
pip install python-amazon-product-api
Alternatively ou can download the .tgz file from Cheeseshop, untar it and run:
python setup.py install
You’ll also find binaries there to make your life easier if you happen to use a Windows system.
The development version is available on bitbucket.org. Feel free to clone the repository and add your own features (see also How to contribute).
hg clone http://bitbucket.org/basti/python-amazon-product-api/
If you like what you see, drop me a line at basti at redtoad dot de.