Wing IDE is one of the best editor for python programming - with built-in interpreter - for beginners in its free version.
WingIDE was designed by python developers for python developers especially for teaching python. The free version obviously has fewer options than the professional version (the price is quite low for the pro version: $ 45).
You can download the software in its free version here: WingIDE python IDE.
If you are on Ubuntu download the .deb, double click on the file and click install. If you encounter any dependency issues, consider running the following command:
sudo apt-get install -f