Via this update center (which you can register in Tools | Plugins | Settings), you'll find you have the Python plugin available in NetBeans IDE 7.3:
http://deadlock.netbeans.org/hudson/job/nbms-and-javadoc/lastStableBuild/artifact/nbbuild/nbms/updates.xml.gz
Lots of features are provided (http://wiki.netbeans.org/Python) but I especially like the ability of opening existing Python projects, such as the open source Cheetah templating engine, which I succeeded to build, as can be seen here:
