MyBasicCalci3.py

# A Simple Calculator App By Using Tkinter (Python GUI Module)


from tkinter import *

root = Tk()
root.title("Calculator")
# So that it becomes of fixed size
root.resizable(0, 0)
# So that it remains on top of the screen
root.wm_attributes("-topmost", 1)

# Label
Label1 = Label(root, text="Calculator app")
Label1.grid(row=0, columnspan=8)

# Variables
equa = ""
equation = StringVar()

calculation = Label(root, textvariable=equation)

equation.set("Enter your expression : ")

calculation.grid(row=2, columnspan=8)


def btnPress(num):
    global equa
    equa = equa + str(num)
    equation.set(equa)


def EqualPress():
    global equa
    total = str(eval(equa))
    equation.set(total)
    equa = ""


def ClearPress():
    global equa
    equa = ""
    equation.set("")
Button0 = Button(root, text="0", command=lambda: btnPress(0), borderwidth=1, relief=SOLID)
Button0.grid(row=6, column=2, padx=10, pady=10)
Button1 = Button(root, text="1", command=lambda: btnPress(1), borderwidth=1, relief=SOLID)
Button1.grid(row=3, column=1, padx=10, pady=10)
Button2 = Button(root, text="2", command=lambda: btnPress(2), borderwidth=1, relief=SOLID)
Button2.grid(row=3, column=2, padx=10, pady=10)
Button3 = Button(root, text="3", command=lambda: btnPress(3), borderwidth=1, relief=SOLID)
Button3.grid(row=3, column=3, padx=10, pady=10)
Button4 = Button(root, text="4", command=lambda: btnPress(4), borderwidth=1, relief=SOLID)
Button4.grid(row=4, column=1, padx=10, pady=10)
Button5 = Button(root, text="5", command=lambda: btnPress(5), borderwidth=1, relief=SOLID)
Button5.grid(row=4, column=2, padx=10, pady=10)
Button6 = Button(root, text="6", command=lambda: btnPress(6), borderwidth=1, relief=SOLID)
Button6.grid(row=4, column=3, padx=10, pady=10)
Button7 = Button(root, text="7", command=lambda: btnPress(7), borderwidth=1, relief=SOLID)
Button7.grid(row=5, column=1, padx=10, pady=10)
Button8 = Button(root, text="8", command=lambda: btnPress(8), borderwidth=1, relief=SOLID)
Button8.grid(row=5, column=2, padx=10, pady=10)
Button9 = Button(root, text="9", command=lambda: btnPress(9), borderwidth=1, relief=SOLID)
Button9.grid(row=5, column=3, padx=10, pady=10)
Plus = Button(root, text="+", command=lambda: btnPress("+"), borderwidth=1, relief=SOLID)
Plus.grid(row=3, column=4, padx=10, pady=10)
Minus = Button(root, text="-", command=lambda: btnPress("-"), borderwidth=1, relief=SOLID)
Minus.grid(row=4, column=4, padx=10, pady=10)
Multiply = Button(root, text="*", command=lambda: btnPress("*"), borderwidth=1, relief=SOLID)
Multiply.grid(row=5, column=4, padx=10, pady=10)
Divide = Button(root, text="/", command=lambda: btnPress("/"), borderwidth=1, relief=SOLID)
Divide.grid(row=6, column=4, padx=10, pady=10)
Equal = Button(root, text="=", command=EqualPress, borderwidth=1, relief=SOLID)
Equal.grid(row=6, column=3, padx=10, pady=10)
Clear = Button(root, text="C", command=ClearPress, borderwidth=1, relief=SOLID)
Clear.grid(row=6, column=1, padx=10, pady=10)

root.mainloop()