Tkinter Listbox搜索结果选择与传值：如何避免事件绑定导致的循环执行？

<code class="python">import tkinter as tk

def search_and_display(listbox, search_term):
    """执行搜索并更新Listbox内容"""
    results = get_results(search_term) #  假设get_results函数已定义，用于执行搜索操作
    listbox.delete(0, tk.END)
    for result in results:
        listbox.insert(tk.END, result)

def select_and_transfer(listbox):
    """处理Listbox选择事件，进行值传递"""
    try:
        selected_value = listbox.get(listbox.curselection()[0])
        # 使用 selected_value 执行其他操作 (例如：打印或传递给其他函数)
        print(f"Selected value: {selected_value}")
    except IndexError:
        # 处理未选择任何项的情况
        print("No item selected.")

root = tk.Tk()
listbox = tk.Listbox(root)
listbox.pack()

search_term = tk.StringVar() #  用于存储搜索关键词
search_entry = tk.Entry(root, textvariable=search_term)
search_entry.pack()

search_button = tk.Button(root, text="搜索", command=lambda: search_and_display(listbox, search_term.get()))
search_button.pack()

listbox.bind("<<ListboxSelect>>", lambda event: select_and_transfer(listbox)) # 使用<<ListboxSelect>>事件

root.mainloop()</code>