Suggested setup instructions

Use conda
Start a new conda environment, suggested to use python 3.6 or 3.7:

conda create -n causalnex python=3.7

(replace 'causalnex' with your preferred name). Do NOT try and do the install in the base environment, or use python 3.8.

Activate environment:

conda activate causalnex

Use conda to install pygraphviz, rather than pip

conda install pygraphviz

If you get an error that the package can't be found, try with conda-forge:

conda install --channel "conda-forge" pygraphviz

Use conda to install jupyter notebooks too

conda install notebook

(or if that doesn't work, conda install --channel "conda-forge" notebook)

The remainder of the packages should install smoothly using pip:

pip install -r requirements.txt

Start Jupyter using jupyter notebook and navigate to the Workbook.