用tkinter的treeview写一个树状列表的代码

以下是一个简单的树状列表的例子，使用了tkinter的treeview组件：

import tkinter as tk
from tkinter import ttk

class TreeViewExample:

    def __init__(self):
        self.tree = None
        self.setup_ui()

    def setup_ui(self):
        root = tk.Tk()
        root.title("Tree View Example")

        # Create a Treeview widget
        self.tree = ttk.Treeview(root)
        self.tree.pack(expand=True, fill=tk.BOTH)

        # Define the columns
        self.tree["columns"] = ("Name", "Age", "Gender")

        # Add columns
        self.tree.column("#0", width=0, stretch=tk.NO)
        self.tree.column("Name", anchor=tk.W, width=100)
        self.tree.column("Age", anchor=tk.CENTER, width=50)
        self.tree.column("Gender", anchor=tk.W, width=50)

        # Add headings
        self.tree.heading("#0", text="", anchor=tk.W)
        self.tree.heading("Name", text="Name", anchor=tk.W)
        self.tree.heading("Age", text="Age", anchor=tk.CENTER)
        self.tree.heading("Gender", text="Gender", anchor=tk.W)

        # Add items to the treeview
        parent = self.tree.insert("", tk.END, text="Parent", open=True)
        self.tree.insert(parent, tk.END, text="Child 1", values=("John", "25", "Male"))
        self.tree.insert(parent, tk.END, text="Child 2", values=("Mary", "20", "Female"))

        # Bind double click event to handle item selection
        self.tree.bind("<Double-1>", self.on_item_selected)

        root.mainloop()

    def on_item_selected(self, event):
        item = self.tree.selection()[0]
        print("Selected item:", item)

if __name__ == "__main__":
    TreeViewExample()

该例子创建了一个包含三列（姓名，年龄和性别）的树状列表，并向其中添加了两个子项（Child 1和Child 2）作为父项（Parent）的子节点。还绑定了双击事件（on_item_selected）来处理项目的选择。