错误：_tkinter.TclError：错误的窗口路径名“.!button”

Question

So today I tried to use python classes for the first time, to remove the excessive use of global keyword. I am trying to create a tkinter window in which, when we click one button it removes the clicked button and replaces it with a new button. And when we click it again, it removes this button and replaces the old (first) button and this should cycle through out...

This is my code which I made:

# ================= Importing Modules ===================
from tkinter import *
import tkinter as tk

# ====================================================
class Test():
 
    # ============= Play Button Click =============
    def fun1(self):
            self.hi.destroy()
            self.he.place(x=350,y=340)

    # ============ Pause Button Click =============
    def fun2(self):
            self.he.destroy()
            self.hi.place(x=350,y=340)
            
    # ============ Player Window ================
    def __init__(self):
        self.root = Tk()
        self.root.geometry('700x400')
        self.root.resizable(0,0)
        self.root["bg"] = "black"
        
        self.hi = tk.Button(self.root, text="button 1", bg="white", bd=0, command=lambda: self.fun1() , relief=RIDGE)
        self.hi.place(x=350,y=340)

        self.he = tk.Button(self.root, text="button 2", bg="white", bd=0,  command=lambda: self.fun2() , relief=RIDGE)
        self.root.mainloop()

# ============== Calling ===========

if __name__ == '__main__':
        Test()

    

But Instead of the desired output, sadly, I got this error:

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Program Files\Python310\lib\tkinter\__init__.py", line 1921, in __call__
    return self.func(*args)
  File "C:/XXX/XXX/Desktop/test.py", line 29, in <lambda>
    self.he = tk.Button(self.root, text="button 2", bg="white", bd=0,  command=lambda: self.fun2() , relief=RIDGE)
  File "C:/XXX/XXX/Desktop/test.py", line 16, in fun2
    self.hi.place(x=350,y=340)
  File "C:\Program Files\Python310\lib\tkinter\__init__.py", line 2477, in place_configure
    self.tk.call(
_tkinter.TclError: bad window path name ".!button"

SO MY QUESTION IS:

doubt1 = Any idea what I am doing wrong?
doubt2 = Or isn't this possible?
if doubt1 or doubt2:
   Please explain it...
elif:
   Please tell me a better alternative or idea, how to do this efficiently.
else:
   Note: I have researched so many questions. Nothing helped me out. Especially ---|
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Answer 1

You're destroying self.hi and then later trying to call place on the destroyed button. Once a widget has been destroyed you can no longer use it.

If you want to keep cycling the buttons, don't destroy them. Since you are using place , you can use self.hi.place_forget() and self.he.place_forget() to remove the buttons from view without destroying them.