Razi is a package that provides extensions to SQLAlchemy to work with chemical databases.
Currently, development is mainly focused on the functionalities provided by the RDKit extension for the PostgreSQL database, but support for additional database backends is in the plans.
Source code is available on GitHub. Either clone the repository or download a source package, change into the razi directory and type the following command (since the project is still in its earlier development phases, you may want to use a virtualenv):
python setup.py install
This documentation is available from http://razi.readthedocs.org/.