Psycopg is the most popular PostgreSQL database adapter for the Python programming language. Its main features are the complete implementation of the Python DB API 2.0 specification and the thread safety (several threads can share the same connection). It was designed for heavily multi-threaded applications that create and destroy lots of cursors and make a large number of concurrent "INSERT"s or "UPDATE"s.
Psycopg 2 is mostly implemented in C as a libpq wrapper, resulting in being both efficient and secure. It features client-side and server-side cursors, asynchronous communication and notifications, "COPY TO/COPY FROM" support. Many Python types are supported out-of-the-box and adapted to matching PostgreSQL data types; adaptation can be extended and customized thanks to a flexible objects adaptation system.
Psycopg 2 is both Unicode and Python 3 friendly.
Documentation is included in the 'doc' directory and is available online.
If all the dependencies are met (i.e. you have the Python and libpq development packages installed in your system) the standard:
python setup.py build sudo python setup.py install
should work no problem. In case you have any problem check the 'install' and the 'faq' documents in the docs or online.
For any other resource (source code repository, bug tracker, mailing list) please check the project homepage.