目前我正在研究一個重置按鈕，它將所有內容設置回它的樣子。到目前為止，這就是它的樣子：def reset():   box1.deselect()   box2.deselect() #unticks all checkboxes   self.sendingBTN['state'] = 'disabled' #disables buttons back how I needed them to be現在我正在努力如何將下拉值設置回默認值。我的下拉菜單值包含特定文件夾內所有 jpg 文件的路徑。我已經為它分配了一個默認值：self.vars.set('All JPGs listed here..') # set the default option但是，當我從下拉菜單中選擇一個值時，默認值會消失，這就是我想知道如何重置它的原因。另外，我不太確定如何從顯示中刪除圖像。任何幫助將不勝感激！這是我的代碼：self.vars = StringVar()# Directoryself.directory = "C:/Users/spice/Desktop/allFiles/"self.choices = glob.glob(os.path.join(self.directory, "*.jpg"))self.vars.set('All JPGs listed here..') # set the default option# Imagesdef change_dropdown():    imgpath = self.vars.get()    img = Image.open(imgpath)    photo = ImageTk.PhotoImage(img)    label2.image = photo    label2.configure(image=photo)    self.CaptureScreen['state'] = 'normal'#return path valueself.p = Nonedef function2(value):    global p    self.p = Path(value)    print(self.p)#reset valuesdef reset():     self.Checkbox1.deselect()    self.Checkbox2.deselect()    self.Checkbox3.deselect()    self.Checkbox4.deselect()    self.Checkbox5.deselect()    self.Checkbox6.deselect()    self.Checkbox7.deselect()    self.Checkbox8.deselect()    self.Checkbox9.deselect()    self.Checkbox10.deselect()    self.Checkbox11.deselect()    self.Checkbox12.deselect()    self.CaptureScreen['state'] = 'disabled'    self.dataSend['state'] = 'disabled'#widgetsself.msg1 = Label(main, text = "All files here")self.msg1.grid(column = 0, row = 0)self.popupMenu = OptionMenu(main, self.vars, *choices, command = function2)self.popupMenu.grid(row=1, column=0)self.display_label = label2 = Label(main, image=None)self.display_label.grid(row=2, column=0, rowspan = 500)self.open_button = Button(main, text="Open", command=change_dropdown)self.open_button.grid(row=3, column=0)self.resetBtn = Button(main, text = "reset", command = reset)self.resetBtn.grid(column = 1, row = 2, sticky = W)這就是我試圖投入的def reset()        change_dropdown.delete(label2)