Product Version = NetBeans IDE 7.3 (Build 201302132200)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.7.0_17
Runtime = Java HotSpot(TM) 64-Bit Server VM 23.7-b01
We are diligently working to improve Python support for NetBeans 8.1, and you can test our work in progress.
See "How to install new Development build(s) for testing" at http://forums.nbpython.org/viewtopic.php?f=6&t=69
*** Bug 257702 has been marked as a duplicate of this bug. ***
We made huge improvements for Python3 support. They will be part of the next release we plan for August. In the meantime, you can try the dev NBMs : https://bitbucket.org/Jenselme/nb-contrib/downloads/2017-06-04-nbpython-nbms.zip
Check the options in Editor/completion and Python to get the full support.