GNU Emacs provides still another python.el mode. See EmacsEditor for more details.
The EmacsWiki page for PythonMode has information on how to install, configure and add shortcuts keys to python-mode.
The current release is version 6.1.2. The list of changes since the last released version are given, as well as some resources providing installation notes. An example how to setup a complete IDE around python-mode.el was shown at EuroPython 2013. See also