# -*- coding: utf-8 -*-
import tkinter as tk
import tkinter.ttk as ttk
root = tk.Tk()
root.title("tk22.py")
root.geometry("200x120")
#####################################
def fun(event):
    ttkLb1.config(text = "You just click.")
ttk.Style().configure('A.TLabel',padding = 5, 
         relief = 'groove', background = 'pink', foreground = 'blue')
ttk.Style().configure('A.TButton',padding = 5, 
         relief = 'raised', background = 'gold', foreground = 'red')

ttkLb1 = ttk.Label(root, text = "This is a Label.", style = 'A.TLabel')
ttkBtn1 = ttk.Button(root, text = "ttk Button_1", style = 'A.TButton')
ttkLb1.pack()
ttkBtn1.pack(side = tk.BOTTOM)
ttkBtn1.bind("<1>", fun)
#####################################
root.mainloop()