I was trying to use the statistics module.
But it was telling me it wasn’t found.
It’s a new thing in Python3.
I thought I had told org to use Python3 with python-shell-interpreter.
But no.
I checked with
import platform
return platform.python_version()
and it was still version 2.
Turns out you also need: org-babel-python-command set to Python3 too.
See: python - org-mode: how can i point to python3.5 in my org-mode doc? - Emacs Sβ¦