在树上使用.getchildren（）始终返回长度为1的列表

Question

任何善意帮助的人。我确定我做错了什么，但如果我知道它是什么，我该死的。

作为在ttk.Treeview组件中创建目录列表的初步，我正在尝试自学如何将项添加到树中并列出它们。我编写的简单测试例程应该将新子项添加到树中的最后一项。不幸的是，getchildren（）创建的列表总是只有一个项目，只包含根，新项目总是作为根的子项添加 - 并且不会出现在getchildren（）的列表中。项目本身已添加：

以下是相关代码：

# Create a treeview object.
tree1 = ttk.Treeview(left_frame)
tree1.insert('', 'end', 'tree-view test', text="Tree View Root")
# And put it in the window.
tree1.pack()

def tree_experiment(tree_current):
    for i_counter in range(10):
        list_children = tree_current.get_children()
        for child_item in list_children:
            print(child_item)
        last_item = list_children[len(list_children) - 1]
        str_counter = str(i_counter)
        test_item = tree_current.insert(last_item, 'end', '', text='Inserted item ' + str_counter)
        if tree_current.exists(test_item):
            print("Found new item in tree: {}".format(test_item))
        else:
            print("New item in tree not found")
        print(str(len(list_children)) + " items in the tree")

输出结果为：

tree-view test
Found new item in tree: I001
1 items in the tree
tree-view test
Found new item in tree: I002
1 items in the tree
tree-view test
Found new item in tree: I003
1 items in the tree
tree-view test
Found new item in tree: I004
1 items in the tree
tree-view test
Found new item in tree: I005
1 items in the tree
tree-view test
Found new item in tree: I006
1 items in the tree
tree-view test
Found new item in tree: I007
1 items in the tree
tree-view test
Found new item in tree: I008
1 items in the tree
tree-view test
Found new item in tree: I009
1 items in the tree
tree-view test
Found new item in tree: I00A
1 items in the tree

这是一个截图，显示已添加的项目，如果仅作为根的子项：

如果有人可以提供帮助，谢谢，如果我重复了别人的问题，我会道歉。

Answer 1

我已经弄明白了。 getchildren（）只返回节点的直接子节点，而不是递归地返回所有子节点。通过跟踪最后添加的节点，我能够获得我想要的效果。