@chrisittner I will number it before merging. Few suggestions:
I feel like making the notebooks a bit more structured would be nice. For example in MaximumLikelihood Estimator you have mentioned about 2 drawbacks of this method. If you put it under a sub heading and in points, I think it would be much easier for people to find it quickly.
I would like to see a bit more detail on theoretical parts. Our aim with the notebooks is to have a tutorial for PGM using pgmpy.
You can highlight code in markdown. You have used some_method()-method at a lot of places. I would suggest you to replace it with some_method.
The section on Independence tests seems out of place. I don't feel like it should be in Structure learning.
Happy about comments.
Where should I include it in the numbering of the notebooks?