Possibly worth noting some other modules for general graph analysis:

https://graph-tool.skewed.de/

https://networkx.github.io/

http://igraph.org/python/

disclaimer: I haven't worked with igraph but these all certainly have more overhead involved in getting set up.

This is great. Are there plans to add other data structures or are you taking pull requests to do so?

Make one for graphs too please.

Cool, I also had a library for drawing binary tree. https://github.com/msbanik/drawtree

This is pretty cool