# -*- coding: utf-8 -*-
import tkinter as tk
root = tk.Tk()
root.title("tk7.py")
root.geometry("100x100")
#####################################
def hello(event):
    lb.config(text = 'Hello!')
def dClick(event):
    lb.config(text = "You just double click")
    
btn = tk.Button(root, text = "Click", \
borderwidth = 10, bg = '#0000ff', \
fg = 'yellow')

lb = tk.Label(root, text = 'A Label', fg = 'darkgreen')

btn.pack()
btn.bind('<Button-1>',hello)
btn.bind('<Double-1>',dClick)
lb.pack()
#####################################
root.mainloop()