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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_recursive_iterator(self, recursive=False):
 """ Basic recursive iterator whose only purpose is to yield all items and sections in order, with their full paths as keys. Main challenge is to de-duplicate items and sections which have aliases. Do not add any new features to this iterator, instead build others that extend this one. """


        names_yielded = set()

        for obj_alias, obj in self._tree.items():
            if obj.is_section:
                if obj.alias in names_yielded:
                    continue
                names_yielded.add(obj.alias)

                yield (obj.alias,), obj

                if not recursive:
                    continue

                for sub_item_path, sub_item in obj._get_recursive_iterator(recursive=recursive):
                    yield (obj_alias,) + sub_item_path, sub_item

            else:
                # _tree contains duplicates so that we can have multiple aliases point
                # to the same item. We have to de-duplicate here.
                if obj.name in names_yielded:
                    continue
                names_yielded.add(obj.name)

                yield (obj.name,), obj