Extra step needed to install packages from Jupyter Notebook

[gaurav]

The current command for installing packages from Jupyter Notebook didn't work for me -- it installed into my pyenv installation, so my Jupyter Notebook couldn't see it:

pip install opentree

Instead, I followed the steps listed at https://jakevdp.github.io/blog/2017/12/05/installing-python-packages-from-jupyter/#How-to-use-Pip-from-the-Jupyter-Notebook:

import sys
!{sys.executable} -m pip install opentree

That worked!