Why does jupyter display "None not found"?

matt_js picture matt_js · Jul 22, 2016 · Viewed 11.2k times · Source

I am trying to use jupyter to write and edit python code. I have a .ipynb file open, but I see "None not found" in the upper right hand corner and I can't execute any of the code that I write. What's so bizarre is that I'll open other .ipynb files and have no problem. Additionally, when I click on the red "None not found" icon, I'll get the message "The 'None' kernel is not available. Please pick another suitable kernel instead, or install that kernel." I have Python 3.5.2 installed. I suspect the problem is that jupyter is not detecting the Python 3 kernel? It displays "Python[root]" where it should say "Python 3." Does anyone know how to get this fixed?

Screenshot of working code

Screenshot "None not found"

Answer

stsolak picture stsolak · Aug 30, 2016

I had the same problem here. The solution for me was:

  1. in the menu in Kernel -> Change kernel -> choose Python [Root] (or the kernel you want),
  2. save the file,
  3. close it,
  4. reopen it.