get_all_objects_crawl_objects

import c4d

def crawl_and_collect_objects(obj, object_list, depth=0):
    # Add the current object to the list
    object_list.append(obj)

    # Recursively process the children
    child = obj.GetDown()
    while child:
        crawl_and_collect_objects(child, object_list, depth + 1)
        child = child.GetNext()

def main_2():
    # Get the active document
    doc = c4d.documents.GetActiveDocument()

    if doc is None:
        return

    # Get the active object (root of the hierarchy)
    active_object = doc.GetActiveObject()

    if active_object is None:
        return

    # Initialize an empty list to store objects
    object_list = []

    # Collect objects in the hierarchy
    crawl_and_collect_objects(active_object, object_list)

    # Print the collected object names
    print("Collected Objects:")
    for obj in object_list:
        print(obj.GetName())

        cube = c4d.BaseObject(c4d.Ocube)
        cube.InsertUnder(obj)

        doc.InsertObject(cube)

    c4d.EventAdd()


def main():

    obj_list = doc.GetActiveObjects(1)

    for obj in obj_list:
        cube = c4d.BaseObject(c4d.Ocube)
        cube.InsertUnder(obj)

        doc.InsertObject(cube)

    c4d.EventAdd()

if __name__=='__main__':
    main()