PYTHON 3.X PIL pyimage不退出

Question

这是我的简单代码：-

 import tkinter
 from tkinter import *
 from PIL import  Image,ImageTk

 def main():
    body=Tk()
    Top=Frame(body)
    global im,tk
    im=Image.open('kiit200.jpg')
    tk=ImageTk.PhotoImage(im)
    ilab=Label(body,image=tk)
    ilab.pack()
    def button():
        body2=Tk()
        Top2=Frame(body)
        l2=Label(Top2,text="Success")
        l2.pack()
        ilab2=Label(body2,image=tk)
        ilab2.pack()
        mainloop()
   l=Button(command=button,text="test")
   l.pack()
   mainloop()
 main()

当我尝试在button方法中分配相同的图像时，其获取 错误：

File "C:\Users\My Love\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1702, in __call__
    return self.func(*args)
  File "C:\Users\My Love\Desktop\New Folder\Unknown_Project\Unknown_package\test.py", line 20, in button
    ilab2=Label(body2,image=tk)
  File "C:\Users\My Love\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 2763, in __init__
    Widget.__init__(self, master, 'label', cnf, kw)
  File "C:\Users\My Love\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 2296, in __init__
    (widgetName, self._w) + extra + self._options(cnf))
_tkinter.TclError: image "pyimage1" doesn't exist