which ide to use for matplotlib code example

Example 1: best python ide

PyCharm - https://www.jetbrains.com/pycharm/ # Only for python
Visual Studio Code - https://code.visualstudio.com/ # Personally use and can work for tons of different languages (Highly Reccommend)
IDLE # default ide comes with python, its pretty good comes with python documentation

Example 2: the best ide for python

I prefer Vim and Sublime text 3. Sublime text 3 is very beginner friendly. The 
UI is great and it has a lot of features. But it can't handle HUGE projects. 
That's why I recommend Vim too. Vim can be very powerfull in the right hands
and it can handle big projects with ease.