Calculator_v2.py

import tkinter as tk
from tkinter.constants import CURRENT, DISABLED
from FunKey import GetCoor


class Calculator(tk.Frame):
    """Used to create a calculator object.

    Args:
        tk (): tk.Tk() object
    """
    #light/dark mode
    global MyFg; MyFg = "#ffffff"
    global MyBg; MyBg = "#000000"
    global MyBg2; MyBg2 = "#888888"
    global mode; mode = "Dark"
    
    def __init__(self, master = None):
        super().__init__(master)
        self.master = master
        #self.pack()
        self.CreateWidgets()      

    def CreateWidgets(self):
        def Dark():

            global MyFg
            global MyBg
            global e

            MyFg, MyBg = MyBg, MyFg
            mode = "Dark" if MyFg == "#ffffff" else "Light"

            CreateButtons(MyFg, MyBg)
            ShowButtons()

            CreateDarkButton(MyFg, mode)

            CreateInput(MyFg, MyBg)

        #create dark button
        def CreateDarkButton(MyFg, mode):
            DarkButton = tk.Button(root, text = mode, fg = MyFg, bg = MyBg2, padx = 12, pady = 8, command = Dark)
            DarkButton.grid(row = 1, column = 0)
        CreateDarkButton(MyFg, mode)

        #create textbox
        def CreateInput(MyFg, MyBg):
            global e

            e = tk.Entry(root, bd = 2, width = 30, fg = MyFg, bg = MyBg)
            e.grid(row = 0, column = 0, columnspan= 4)
            e.insert(0, "0")
        CreateInput(MyFg, MyBg)

        #Functioning of arithmetic operators
        def Fun(function):
            """Reads the number and performs calculations

            Args:
                function (string): an operator (+,-,×,÷,^), "=", CE, ←
            """

            #assigns operator
            if function in ["+","-","×","÷","^"]:
                global operation; operation = function
                global Num1; Num1 = float(e.get())
                e.delete(0, tk.END)

            #performs calculation
            if function == "=":
                if e.get() == "":
                    pass
                else:
                    global Num2; Num2 = float(e.get())
                    e.delete(0, tk.END)
                try:
                    if operation == "+":
                        e.insert(0, Num1+Num2)
                    elif operation == "-":
                        e.insert(0, Num1-Num2)
                    elif operation == "×":
                        e.insert(0, Num1*Num2)
                    elif operation == "÷":
                        e.insert(0, Num1/Num2)
                    elif operation == "^":
                        e.insert(0, Num1**Num2)

                except NameError as Err:
                    #pass
                    temp = e.get()
                    e.delete(0, tk.END)
                    e.insert(0, temp)

            #clears everything
            if function == "CE":
                e.delete(0, tk.END)
                operation = ""

            #backspace
            if function == "←":
                temp = e.get()
                e.delete(0, tk.END)
                e.insert(0, temp[0:-1])

        #Insert numbers
        def Num(number):
            """Inserts a number at the end of the string in textbox

            Args:
                number (string): Values from 0 to 9 and "." 
            """
            if number == ".":
                if e.get().count(".") == 0:
                    e.insert(tk.END, str(number))

            elif e.get() == "0":
                e.delete(0, tk.END)
                e.insert(tk.END, str(number))
            elif e.get() == "":
                #e.delete(0, tk.END)
                e.insert(0, str(number))


            else: e.insert(tk.END, str(number))


        #Buttons creation
        Button = {}
        Nums = list(range(0,10))
        Funs = ["+","-","×","÷","^","=",".","←","CE"]


        #Buttons declaration
        def CreateButtons(MyFg, MyBg):
            Button[0] = tk.Button(root, text = 0, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(0))
            Button["."] = tk.Button(root, text = ".", fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num("."))#, state= tk.DISABLED)

            Button[1] = tk.Button(root, text = 1, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(1))
            Button[2] = tk.Button(root, text = 2, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(2))
            Button[3] = tk.Button(root, text = 3, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(3))

            Button[4] = tk.Button(root, text = 4, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(4))
            Button[5] = tk.Button(root, text = 5, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(5))
            Button[6] = tk.Button(root, text = 6, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(6))

            Button[7] = tk.Button(root, text = 7, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(7))
            Button[8] = tk.Button(root, text = 8, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(8))
            Button[9] = tk.Button(root, text = 9, fg = MyFg, bg = MyBg, padx = 20, pady = 15, command = lambda: Num(9))

            Button["+"] = tk.Button(root, text = "+", fg = MyFg, bg = MyBg2, padx = 20, pady = 15, command = lambda: Fun("+"))
            Button["-"] = tk.Button(root, text = "-", fg = MyFg, bg = MyBg2, padx = 20, pady = 15, command = lambda: Fun("-"))
            Button["×"] = tk.Button(root, text = "×", fg = MyFg, bg = MyBg2, padx = 20, pady = 15, command = lambda: Fun("×"))
            Button["÷"] = tk.Button(root, text = "÷", fg = MyFg, bg = MyBg2, padx = 20, pady = 15, command = lambda: Fun("÷"))
            Button["^"] = tk.Button(root, text = "^", fg = MyFg, bg = MyBg2, padx = 18, pady = 8, command = lambda: Fun("^"))

            Button["="] = tk.Button(root, text = "=", fg = MyFg, bg = MyBg2, padx = 20, pady = 15, command = lambda: Fun("="))
            Button["←"] = tk.Button(root, text = "←", fg = MyFg, bg = MyBg2, padx = 18, pady = 8, command = lambda: Fun("←"))
            Button["CE"] = tk.Button(root, text = "CE", fg = MyFg, bg = MyBg2, padx = 18, pady = 8, command = lambda: Fun("CE"))
        CreateButtons(MyFg, MyBg)

        #Buttons in grid
        def ShowButtons():
            for i in Nums + Funs:
            
                iRow, iCol = GetCoor(obj = i)
                Button[i].grid(row = iRow, column = iCol)
        ShowButtons()

root = tk.Tk()
root.title("Calc v2")
root.iconbitmap("Icon1.ico")
root.geometry("230x280")

Calc = Calculator(master = root)

Calc.mainloop()