Basic_Tkinter_Calculator.py

from tkinter import *
import math

while True:

    ans = 0

    root = Tk()

    root.wm_attributes('-topmost', 1)
    root.wm_title("Calculator")

    num_entry1 = IntVar()
    num_entry2 = IntVar()

    entry1 = Entry(root, textvariable=num_entry1, width=53)
    entry1.pack()
    entry1.delete(0, END)
    entry1.insert(0, "0")

    entry2 = Entry(root, textvariable=num_entry2, width=53)
    entry2.pack()
    entry2.delete(0, END)
    entry2.insert(0, "0")

    answer = Text(root, width=40, height=2)
    answer.pack()
    answer.insert("1.0", ans)
    answer.config(state=DISABLED)

    operation = StringVar(root)
    operation.set("Add")
    option = OptionMenu(root, operation, "Add", "Subtract", "Multiply", "Divide (Float)", "X^Y",
                        "√num1", "√num2", "num1!", "num2!", "Pythagoras")
    option.pack()

    def calc():

        global ans

        num1 = num_entry1.get()
        num2 = num_entry2.get()
        op = operation.get()

        if op == 'Add':
            ans = num1 + num2
        elif op == 'Subtract':
            ans = num1 - num2
        elif op == 'Multiply':
            ans = num1 * num2
        elif op == 'Divide (Float)':
            ans = num1 / num2
        elif op == 'X^Y':
            ans = num1 ** num2
        elif op == '√num1':
            ans = math.sqrt(num1)
        elif op == '√num2':
            ans = math.sqrt(num2)
        elif op == 'num1!':
            ans = math.factorial(num1)
        elif op == 'num2!':
            ans = math.factorial(num2)
        elif op == 'Pythagoras':
            ans = math.sqrt(((num1 ** 2) + (num2 ** 2)))
        else:
            pass

        answer.config(state=NORMAL)
        answer.delete("1.0", END)
        answer.insert("1.0", ans)
        answer.config(state=DISABLED)

        return

    def calcquit():
        global z
        z = 1
        root.destroy()

    button1 = Button(root, text="Calculate", command=calc)
    button1.pack()

    button2 = Button(root, text="Quit", command=calcquit)
    button2.pack()

    mainloop()

    if z == 1:
        break
    else:
        pass