* Install
Install in "development mode" so any change of the program is effective.

Note: For system wide (global) installation log in as root or use sudo for example.
For local (user) installation the local path must be in the PYTHONPATH environment variable.
Typically $HOME/.local/lib/pythonX.Y/site-packages

' pip install -e .
or
' pip install --user -e .
or
' python -m pip install -e .
or
' easy_install --prefix=$HOME/.local -e .
or
' pip install --install-option="--prefix-$HOME/.local" -e .


* Uninstall
pip uninstall materials