Dunder variables in inspector.py

[mdanb]

I'm taking a look at the source code for Pytorch Geometric, and particularly I'm currently looking at inspector.py. I noticed that some variables of the Inspector class have double underscores. What is that supposed to signify? This post by Dan Bader suggests to avoid naming one's variables using dunder, so I was just wondering why they're being used here.

[rusty1s]

Thanks for the pointer. We do not strictly follow this guidance in PyG, and we use _* and __* interchangeably to denote private methods/variables.

[mdanb]

Actually sorry for the confusion I meant the file for Message Passing
This one has variables that are called __*__ like __explain__ while other variables don’t. What do both leading and following dunder signify for variables?

[rusty1s]

It just signifies that those shouldn't be touched by the user, although I agree that dunder usage should be made more consistent.