import tkinter as tk
class Calculator:
def init(self, master):
self.master = master
master.title("Calculator")
self.display = tk.Entry(master, width=40, borderwidth=5)
self.display.grid(row=0, column=0, columnspan=4, padx=10, pady=10)
# Define buttons
self.button_1 = tk.Button(master, text="1", padx=40, pady=20, command=lambda: self.button_click(1))
self.button_2 = tk.Button(master, text="2", padx=40, pady=20, command=lambda: self.button_click(2))
self.button_3 = tk.Button(master, text="3", padx=40, pady=20, command=lambda: self.button_click(3))
self.button_4 = tk.Button(master, text="4", padx=40, pady=20, command=lambda: self.button_click(4))
self.button_5 = tk.Button(master, text="5", padx=40, pady=20, command=lambda: self.button_click(5))
self.button_6 = tk.Button(master, text="6", padx=40, pady=20, command=lambda: self.button_click(6))
self.button_7 = tk.Button(master, text="7", padx=40, pady=20, command=lambda: self.button_click(7))
self.button_8 = tk.Button(master, text="8", padx=40, pady=20, command=lambda: self.button_click(8))
self.button_9 = tk.Button(master, text="9", padx=40, pady=20, command=lambda: self.button_click(9))
self.button_0 = tk.Button(master, text="0", padx=40, pady=20, command=lambda: self.button_click(0))
self.button_add = tk.Button(master, text="+", padx=39, pady=20, command=self.button_add)
self.button_equal = tk.Button(master, text="=", padx=91, pady=20, command=self.button_equal)
self.button_clear = tk.Button(master, text="Clear", padx=79, pady=20, command=self.button_clear)
self.button_subtract = tk.Button(master, text="-", padx=41, pady=20, command=self.button_subtract)
self.button_multiply = tk.Button(master, text="*", padx=40, pady=20, command=self.button_multiply)
self.button_divide = tk.Button(master, text="/", padx=41, pady=20, command=self.button_divide)
# Put the buttons on the screen
self.button_1.grid(row=3, column=0)
self.button_2.grid(row=3, column=1)
self.button_3.grid(row=3, column=2)
self.button_4.grid(row=2, column=0)
self.button_5.grid(row=2, column=1)
self.button_6.grid(row=2, column=2)
self.button_7.grid(row=1, column=0)
self.button_8.grid(row=1, column=1)
self.button_9.grid(row=1, column=2)
self.button_0.grid(row=4, column=0)
self.button_clear.grid(row=4, column=1, columnspan=2)
self.button_add.grid(row=5, column=0)
self.button_equal.grid(row=5, column=1, columnspan=