[Tutor] How to find descendants recursively?

[Timo]

I have a datafile which is parsed by an external library, I'm having
trouble creating a hierarchical structure of the data.

This is what I got so far:

items = get_items() # returns a generator
for item in items:
    print(item)
    children = get_children(item) # also returns a generator
    for child in children:
        print("--", child)

This is fine as it will get the children for each parent item. I can't seem
to figure out how to go further and get the chidren of the children and so
on.

Thanks.
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