import tkinter as tk

root = tk.Tk()
root.title('Calculatov v2.0')


def insert_nums(num):
	entry1.insert(tk.END, num)


buttons = [
	'7', '4', '1', '0',
	'8', '5', '2', '.',
	'9', '6', '3', '=',
	'<<<', '/', '*', '-', '+',
]

frame0 = tk.Frame(root)
frame0.pack(expand=tk.YES, fill=tk.BOTH)
frame1 = tk.Frame(root)
frame1.pack(side=tk.LEFT, expand=tk.YES, fill=tk.BOTH)

entry1 = tk.Entry(frame0, bg='#2C3033', fg='#FFFFFF', font='Helvetica 18 bold', bd='10')
entry1.pack(expand=tk.YES, fill=tk.BOTH)

for button in buttons[0:4]:
	Button = tk.Button(frame1, text=button, width=5, heigh=2, bg='#202125', fg='#FFFFFF', font='Helvetica 18 bold', command=insert_nums(button))
	Button.pack(expand=tk.YES, fill=tk.BOTH)