ModuleNotFoundError: No module named 'matplotlib'

I cannot draw a plot in a jupyter notebook. It says: "ModuleNotFoundError: No module named 'matplotlib' " even though I have installed the matplotlib.

I have Ubuntu 18.04 as OS.

(By the way, I noticed that I have several python versions in my /usr/lib like, python2.7, python3 ; 3.6; 3.7 .)

1 Answer

try to install matplotlib for python3

e.g.:

sudo pip3 install matplotlib