可选
tree: GTreeIf the tree node is not yet part of a tree, you can pass the tree instance to create the widget.
The child node to find the index of.
The index of the specified child node, or -1 if not found.
The child node whose index is to be set.
The new index for the child node. If the index is less than 0, it will be set to 0; if greater than the number of children, it will be set to the number of children.
En
Represents a node in a tree structure.
Zh
表示树结构中的一个节点。