我试图创建一个有主菜单和设置菜单的应用程序。我想为每一个设置背景。但我从设置菜单开始。我收到一个错误声明：
_tkinter.TclError: image “pyimage1” doesn’t exist。
我做错什么了？在from tkinter import *
from tkinter.ttk import *
install_directory = ‘…’
# ***********************************MAIN MENU*****************************************************
def root():
# ~~~Defines window~~~
main_window = Tk()
main_window.iconbitmap(install_directory + r’\resources\icons\logo.ico’) # Changes the icon for window
main_window.title(‘Auto Transfer’) # Changes window name
main_window.geometry(“300×200”)
# ~~Adds a background~~~
background = PhotoImage(file=install_directory + r’\resources\backgrounds\stardust.gif’)
label = Label(main_window, image=background)
label.pack()
# ~~~Menu Bar~~~</