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index.py
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from tkinter import *
import tkinter.messagebox
window = Tk()
window.title('Calculator')
frame = Frame(master=window, bg="Green", padx=10)
frame.pack()
entry = Entry(master=frame, borderwidth=3, width=30)
entry.grid(row=0, column=0, columnspan=3, ipady=2, pady=2)
def myclick(number):
entry.insert(END, number)
def equal():
try:
y = str(eval(entry.get()))
entry.delete(0, END)
entry.insert(0, y)
except:
tkinter.messagebox.showinfo("Error", "Syntax Error")
def clear():
entry.delete(0, END)
#BUTTONS 0 till 9
button_1 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = Button(master=frame, text='0', padx=15,
pady=5, width=3, command=lambda: myclick(0))
button_0.grid(row=4, column=1, pady=2)
# OPERATIONS
button_add = Button(master=frame, text="+", padx=15,
pady=5, width=3, command=lambda: myclick('+'))
button_add.grid(row=5, column=0, pady=2)
button_subtract = Button(
master=frame, text="-", padx=15, pady=5, width=3, command=lambda: myclick('-'))
button_subtract.grid(row=5, column=1, pady=2)
button_multiply = Button(
master=frame, text="*", padx=15, pady=5, width=3, command=lambda: myclick('*'))
button_multiply.grid(row=5, column=2, pady=2)
button_div = Button(master=frame, text="/", padx=15,
pady=5, width=3, command=lambda: myclick('/'))
button_div.grid(row=6, column=0, pady=2)
# Clear button
button_clear = Button(master=frame, text="clear",
padx=15, pady=5, width=12, command=clear)
button_clear.grid(row=6, column=1, columnspan=2, pady=2)
# Equal button
button_equal = 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()