python-mode (python-mode.el) is a major mode for editing Python with the EmacsEditor. It is a separate mode from the Python mode included in GNU Emacs, known as python.el, and can be installed as an alternative.
python-mode is available on MELPA as python-mode.
The EmacsWiki page ProgrammingWithPythonModeDotEl has information on how to install, configure and add shortcuts keys. An example how to setup a complete IDE around python-mode was shown at EuroPython 2013.