The easiest calculator on python

calculator.py

import tkinter as tk
import  customtkinter as tks

root = tk.Tk()
root.geometry('300x200')
root['bg'] = 'lightblue'

symbols = ['*', '/', '+', '-', '7', '8', '9', '0', '4', '5', '6', 'C', '1', '2', '3', '=']

c = 0
r = 1

def func(x):
     if x == "C":
         text1.configure(text='')

     elif x == '=':
          text1['text'] = eval(text1['text'])
     else:
          text1['text'] += x


for j in range(4):
     root.columnconfigure(weight=1, index=j, minsize=4)
for b in range(5):
     root.rowconfigure(index=b, weight=1 , minsize=4)
text1 = tk.Label(root, text='', bg='lightblue')
text1.grid(row=0, column=0, columnspan=4)
for i in symbols:

         tks.CTkButton(root, text=i, command=lambda x=i: func(x)).grid(row=r, column=c, sticky='nsew')

         c += 1
         if c > 3:
              r += 1
              c = 0

root.mainloop()