TclError：图像“pyimage68”不存在

Question

Had made a tkinter window named Mainpage of which the snippet is present below:

def mainpage():
import tkinter as tk
from PIL import ImageTk, Image
    

root = tk.Tk()

image=Image.open("logo2.png")                                 
photo = ImageTk.PhotoImage(image)                             

lab = tk.Label(root, image=photo, bd=0, highlightthickness=0)  # <----Error is coming for this line in the next code
lab.image=photo
lab.place(x=460,y=245)

button = tk.Button(root, text="Search",font="CenturyGothic",fg="Darkred",width="70", 
height="24",command=veryuseful)
img1 = ImageTk.PhotoImage(file="gold.png") 
button.config(image=img1,compound="center")
button.place(x=850,y=340)
root.mainloop()

There is no problem in the code whatsoever. But, when I import this file to another code an error occurs:

import Mainpage  # <----imported the file here
condition=0        

     for i in d:
        
        if i[3]==username:
            if i[4]==password:
                head=tk.Label(win, text="Welcome to Library X",fg="Light blue",bg="Black" ,font=("Arial",12))
                head.grid(column=1, row=7)
                condition=1
                
                break
            else:
                messagebox.showerror("ERROR", "Wrong Password!")
                condition=2
                break
        else:
            continue
            condition=0
            
    if condition==0:
        messagebox.showerror("ERROR", "Wrong Username!") 
        
    if condition==1:
        
        Mainpage.mainpage()   # <------Used the function mainpage from file

A error comes called "pyimage" I have seen the error many times but this time it is strange The TCL error is: "pyimage10" doesn't exist

And as edit try it again it changes to "pyimage16" and then it keeps on adding 6 to the no. beside pyimage...

If you know the solution to this problem I shall be forever grateful. I have already tried:

1. provided full path to the file
2. used a reference to the image
3. restarted the kernal

As I said, the mainpage file is working normally when I run it but...the problem is in tkinter when I import it to another file.

Answer 1

I got the solution to my problem...if you ever have pyimage error:

Change-

root = tk.Tk()

To-

root = tk.Toplevel()

If this does not work, try:

1. Restarting your kernel
2. Provide full path to the image file
3. Provide a reference to the image

If your problem is solved an upvote would be appreciated:)