To fix Command python setup.py egg_info failed with error code 1 when Installing Python, follow these instructions.

setup.py is normally used by Python to install the module it’s associated with, and can also be used to direct Python to compile C extensions for that module.

I think all that needs to change is to move import psutil inside display_jupyter_version_warnings () under the two Jupyter elif cases (so that it doesn't get encountered when calling the normal ...