matplotlib error - no module named tkinter

I tried to use the matplotlib package via Pycharm IDE on windows 10. when I run this code:

    from matplotlib import pyplot

I get the following error:

    ImportError: No module named 'tkinter'

I know that in python 2.x it was called Tkinter, but that is not the problem - I just installed a brand new python 3.5.1.

EDIT: in addition, I also tried to import 'tkinter' and 'Tkinter' - neither of these worked (both returned the error message I mentioned).

any ideas? thanks in advance

    sudo apt-get install python3-tk


    >> import tkinter # all fine

Edit :

For Windows, I think the problem is you didn't install complete Python package. Since Tkinter should be shipped with Python out of box. See:

I suggest install ipython, which provides powerful shell and necessary packages as well.