calculatorWithGUI.py

import tkinter as tk
import tkinter.messagebox
from tkinter.constants import SUNKEN

# Create a window
window = tk.Tk()
window.title("Calculator")
frame = tk.Frame(master = window, bg = "skyblue", padx = 10)
frame.pack()
entry = tk.Entry(master = frame, relief = SUNKEN, borderwidth = 3, width = 30)
entry.grid(row = 0, column = 0, columnspan = 3, ipady = 2, pady = 2)

def myClick(number):
    entry.insert(tk.END, number)

def equal():
    try:
        y = str(eval(entry.get()))
        entry.delete(0, tk.END)
        entry.insert(0, y)
    except:
        tkinter.messagebox.showinfo("Error", "Syntax Error")

def clear():
    entry.delete(0, tk.END)

button_1 = tk.Button(master = frame, text = "1", padx = 15, pady = 5, width = 3, command = lambda: myClick(1))

button_1.grid(row = 1, column = 0, pady = 2)

button_2 = tk.Button(master = frame, text = "2", padx = 15, pady = 5, width = 3, command = lambda: myClick(2))

button_2.grid(row = 1, column = 1, pady = 2)

button_3 = tk.Button(master = frame, text = "3", padx = 15, pady = 5, width = 3, command = lambda: myClick(3))

button_3.grid(row = 1, column = 2, pady = 2)

button_4 = tk.Button(master = frame, text = "4", padx = 15, pady = 5, width = 3, command = lambda: myClick(4))

button_4.grid(row = 2, column = 0, pady = 2)

button_5 = tk.Button(master = frame, text = "5", padx = 15, pady = 5, width = 3, command = lambda: myClick(5))

button_5.grid(row = 2, column = 1, pady = 2)

button_6 = tk.Button(master = frame, text = "6", padx = 15, pady = 5, width = 3, command = lambda: myClick(6))

button_6.grid(row = 2, column = 2, pady = 2)

button_7 = tk.Button(master = frame, text = "7", padx = 15, pady = 5, width = 3, command = lambda: myClick(7))

button_7.grid(row = 3, column = 0, pady = 2)

button_8 = tk.Button(master = frame, text = "8", padx = 15, pady = 5, width = 3, command = lambda: myClick(8))

button_8.grid(row = 3, column = 1, pady = 2)

button_9 = tk.Button(master = frame, text = "9", padx = 15, pady = 5, width = 3, command = lambda: myClick(9))

button_9.grid(row = 3, column = 2, pady = 2)

button_0 = tk.Button(master = frame, text = "0", padx = 15, pady = 5, width = 3, command = lambda: myClick(0))

button_0.grid(row = 4, column = 1, pady = 2)

button_add = tk.Button(master=frame, text="+", padx=15,
                       pady=5, width=3, command=lambda: myClick('+'))
                       
button_add.grid(row=5, column=0, pady=2)
 
button_subtract = tk.Button(
    master=frame, text="-", padx=15, pady=5, width=3, command=lambda: myClick('-'))

button_subtract.grid(row=5, column=1, pady=2)
 
button_multiply = tk.Button(
    master=frame, text="*", padx=15, pady=5, width=3, command=lambda: myClick('*'))

button_multiply.grid(row=5, column=2, pady=2)
 
button_div = tk.Button(master=frame, text="/", padx=15, pady=5, width=3, command=lambda: myClick('/'))

button_div.grid(row=6, column=0, pady=2)
 
button_clear = tk.Button(master=frame, text="clear",
                         padx=15, pady=5, width=12, command=clear)

button_clear.grid(row=6, column=1, columnspan=2, pady=2)
 
button_equal = tk.Button(master=frame, text="=", padx=15,
                         pady=5, width=9, command=equal)

button_equal.grid(row=7, column=0, columnspan=3, pady=2)

window.mainloop()