This came off the google coral dev board website. This code didnt work for me

python3 -m pip install --user mendel-development-tool

What did work for me after I installed and upgraded PIP. Was this line of below:

python -m pip install --user mendel-development-tool

I removed "python3" and replaced it with "python"

And that worked beautifuiy for me.

python -m pip install --user mendel-development-tool