if you are on Linux most distros come with python2 and python3 installed. python will run system python2, so I guess you installed matplotib in system python2. Now the question is what version runs in Jupyter
you can run
you can run
$ which python to see what version invoke python command.
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs