Python - Recursively Create Arbitrarily Nested Dict Given Three Different Lists

Suppose I am given three lists: a list of roots, a list of children (which can have children), and a list of nodes. On any of the items in these lists, I can call use an attribute

Solution 1:

def _build_structure(self, item)
    if item in list_of_nodes:
        return item
    else:
        return [self._build_structure(child) for child in item.children]

you need to return your recursive call ... if you need more help you will need to post a minimal example of list_of_nodes ....