Before you go ahead and install Nornir, it’s recommended to create your own Python virtualenv. That way you have complete control of your environment and you don’t risk overwriting your systems Python environment.
This tutorial doesn’t cover the creation of a Python virtual environment. The Python documentation offers a guide where you can learn more about virtualenvs. We also won’t cover the installation of pip, but chances are that you already have pip on your system.
Nornir is published to PyPI and can be installed like most other Python packages using the pip tool. You can verify that you have pip installed by typing:
pip --version pip 9.0.3 from /Users/patrick/nornir/lib/python3.6/site-packages (python 3.6)
It could be that you need to use the pip3 binary instead of pip as pip3 is for Python 3 on some systems.
As you would assume, the installation is then very easy.
pip install nornir Collecting nornir Collecting colorama (from nornir) [...] Successfully installed MarkupSafe-1.0 asn1crypto-0.24.0 bcrypt-3.1.4 nornir-2.0.0
Please note that the above output has been abbreviated for readability. Your output will be quite a bit longer. You should see that nornir is successfully installed.
Now we can verify that Nornir is installed and that you are able to import the package from Python.
python >>>import nornir.core >>>
Great, now you’re ready to create an inventory.