calculator

from tkinter import *

root = Tk()
root.geometry("560x600")
root.title("GOSHO Calculator")

entry = Entry(root, width=40)
entry.grid(row=0, column=0, padx=10, pady=10, columnspan=3)


def clear_screen():
    entry.delete(0, END)


def press_buttons(button_pressed):
    current_digit = entry.get()
    entry.delete(0, END)
    entry.insert(0, str(current_digit) + button_pressed)


but1 = Button(root, text='1', padx=40, pady=20, command=lambda: press_buttons('1'))
but1.grid(row=3, column=0)

but2 = Button(root, text='2', padx=40, pady=20, command=lambda: press_buttons('2'))
but2.grid(row=3, column=1)

but3 = Button(root, text='3', padx=40, pady=20, command=lambda: press_buttons('3'))
but3.grid(row=3, column=2)

but4 = Button(root, text='4', padx=40, pady=20, command=lambda: press_buttons('4'))
but4.grid(row=2, column=0)

but5 = Button(root, text='5', padx=40, pady=20, command=lambda: press_buttons('5'))
but5.grid(row=2, column=1)

but6 = Button(root, text='6', padx=40, pady=20, command=lambda: press_buttons('6'))
but6.grid(row=2, column=2)

but7 = Button(root, text='7', padx=40, pady=20, command=lambda: press_buttons('7'))
but7.grid(row=1, column=0)

but8 = Button(root, text='8', padx=40, pady=20, command=lambda: press_buttons('8'))
but8.grid(row=1, column=1)

but9 = Button(root, text='9', padx=40, pady=20, command=lambda: press_buttons('9'))
but9.grid(row=1, column=2)

but0 = Button(root, text='0', padx=40, pady=20, command=lambda: press_buttons('0'))
but0.grid(row=4, column=0)

but_clear = Button(root, text="clean", padx=75, pady=20, command=clear_screen)
but_clear.grid(row=4, column=1, columnspan=2)

but_equal = Button(root, text="=", padx=90, pady=20)  # , command=press_buttons)
but_equal.grid(row=5, column=1, columnspan=2)

but_plus = Button(root, text="+", padx=39, pady=20)  # , command=press_buttons())
but_plus.grid(row=5, column=0)

root.mainloop()