Until we are on pypi, it's a bit complicated:
pip install --upgrade pip
pip install wheel
pip install git+https://github.com/datamuc/py-monplugin@v0.3
pip install git+https://github.com/consol/check_vsphere
If not stated otherwise in a source file everything is licensed under GNU AFFERO GENERAL PUBLIC LICENSE Version 3.
See also the LICENSE file.