Confused about the generator design?

[gzrjzcx]

Hi,
Im new here and I am a little confused about the tick() generator design after skimming through the code roughly. I cannot figure out the case which I must use the iterator to visit the whole tree? I have found the iterator symbol in the whole repo, while I cant find the use of this symbol to do something. Would u mind explaining the idea of generator for me?

By the way, is it tick a node and return its result status would be a more intuitive way?

Thanks

[sea-bass]

I agree and it indeed would be easier.

If you look at py_trees.trees.Tree.tick(), you will see the use of the generator:

py_trees/py_trees/trees.py

Line 412 in 1496ec3

for node in self.root.tick():

So you don't have to use it yourself, but rather just put it into a tree, run tick() on it, and grab the tree's .status attribute as needed.