'''If you are using NetBeans 8.1''', by 26-Nov-2015 you should be able to access the Python plugin directly from the IDE 8.1 Tools->Plugin menu!
This Python plugin requires NetBeans 8.1 from https://netbeans.org/downloads/index.html
The detail/listing for the Python plugin is at http://plugins.netbeans.org/plugin/61688/?show=true