run case_study_bank.py plotting issue on Mac about ylearn

[JianxunSu]

The training is okay, can't plot the causal graph

[lixfz]

graphviz is required to plot causal graph, see http://www.graphviz.org/download/ for more details.

If your python env was created with conda, you can also install graphviz with command :

conda install graphviz 

[JianxunSu]

Yes, it works, Thanks! So should the graphviz be included in requirements.txt or is this just a library needed for MacOS? I uploaded this notebook to Google Colab run successfully, it needn't ask me to install graphviz, the only library manually installed is just ylearn. @lixfz

[lixfz]

The graphviz is an operating system dependent software, can not be installed through pip command.
Generally, it should be installed through the os's package manager.

Google Colab has installed the graphviz by default，so we can use it directly.

[JianxunSu]

Ok, Thanks for explanation!

[JianxunSu]

By the way, I did install graphviz on my MacOs with "pip install graphviz" and pycharm python package, like following:
(venv) jevin@JSU YLearn (main) $ pip install graphviz
Collecting graphviz
Using cached graphviz-0.20-py3-none-any.whl (46 kB)
Installing collected packages: graphviz
Successfully installed graphviz-0.20
@lixfz

If I remove this graphviz-0.20 python library, it will generate the original error again.

I think I have installed OS level graphviz already(before downloading YLearn), this python library installation only provide an interface, is that correct?

[lixfz]

The pip installed graphviz is just a python wrapper of os native graphviz.

The description from pypi:

@JianxunSu

[JianxunSu]

@lixfz in my case, the pip install helped, so I should install the os package already.