посчитайте Найти сумму квадратов чисел от m до n. (python, через Tkinter)

import tkinter as tk

class Programm(tk. Tk):

def __init__(self):

super(). __init__()

self. title("Сумма квадратов")

self. lbl = tk. Label(self, text="Введите m",font=("Times New Roman", 25))

self. lbl. pack()

self. inputer=tk. Entry(self, width=10, font=("Times New Roman", 25))

self. inputer. pack()

self. lbl1 = tk. Label(self, text="Введите n", font=("Times New Roman", 25))

self. lbl1. pack()

self. inputer1=tk. Entry(self, width=10, font=("Times New Roman", 25))

self. inputer1. pack()

self. btn=tk. Button(self, text="Подсчитать", command=self. clicked, font=("Times New Roman", 25))

self. btn. pack()

self. txt = tk. Label(self, text=" :", font=("Times New Roman", 25))

self. txt. pack()

def clicked(self):

m=int(self. inputer. get())

n=int(self. inputer1. get())

res=0

for i in range(m,n+1):

res+=i**2

self. txt. destroy()

self. txt = tk. Label(self, text=" : "+str(res), font=("Times New Roman", 25))

self. txt. pack()

if __name__ == "__main__":

app=Programm()

app. mainloop()

github: https://gist. github. com/Pyatii/c869dfd498ab0e6a3cb4968053ddf2c4