为什么当我调用.place_forget（）方法时，我的Label不消失？

我正在编写一个应用程序，它具有一个功能，当在列表框中选择“是”时，它将运行放置标签的代码。当我使用.place_forget（）方法或什至.place（）方法将其移出屏幕时，我得到了两个版本的Label或它根本没有移动，我对为什么感到非常困惑。

#dropdown event handling
def selected(event):
    entrydisplay = clicked.get()
    if 'Yes' in entrydisplay:
        global extrainfo
        extrainfo = tk.Entry(root, width=32)
        extrainfo.place(x=312,y=201)
        extra_label = tk.Label(root, text='If yes, what team and level of FIRST?', width=28, height=1, bg='red3', fg='black')
        extra_label.place(x=110, y=200)
        interest_label.place(x=130,y=230)
        interest_mechanical.place(x=311, y=228)
        interest_electrical.place(x=311, y=248)
        interest_marketing.place(x=311, y=268)
        interest_design.place(x=311, y=288)
        interest_programming.place(x=311, y=308)
        interest_chairmans.place(x=311, y=328)
        interest_advocacy.place(x=311, y=348)
        interest_leadership.place(x=311, y=368)
        interest_video_production.place(x=311, y=388)
        interest_social_media.place(x=311, y=408)
        other_checkbox.place(x=311, y=428)
        check_box_move = "0"
    if 'No' in entrydisplay:
        check_box_move = "1"

def Clear():
    name.delete(0, END)
    email.delete(0, END)
    clicked.set(options[2])
    grade.delete(0, END)
    interest_mechanical.deselect()
    interest_electrical.deselect()
    interest_marketing.deselect()
    interest_design.deselect()
    interest_programming.deselect()
    interest_chairmans.deselect()
    interest_advocacy.deselect()
    interest_leadership.deselect()
    interest_social_media.deselect()
    interest_video_production.deselect()
    other_checkbox.deselect()
    extrainfo.delete(0, END)
    other_entry.delete(0,END)
    other_entry.place(x=798, y=400)
    extrainfo.place(x=798, y=201)
    extra_label.destroy()

这是我写的一个版本，因此您可以复制我的问题：

from tkinter import *
import tkinter as tk

root = Tk()
root.geometry("400x400+0+0")
root.title("test")


def selected(event):
    global test_label
    test_label = tk.Label(root, text='TEST')
    test_label.place(x=20,y=20)

def Delete():
    test_label.destroy

#DROPDOWN BASE CODE
options = [
    'Yes',
    'No',
    'Select'
]

clicked = StringVar()
clicked.set(options[2])
#ENDS ABOVE
Dropdown = tk.OptionMenu(root, clicked, *options, command=selected)
Dropdown.place(x=311, y=165)

delete_button = tk.Button(root, text='Click to delete text', command=Delete)
delete_button.place(x=100,y=100)

root.mainloop()