# -*- coding: utf-8 -*-
import tkinter as tk
import tkinter.ttk as ttk
root = tk.Tk()
root.title("tk25.py")
root.geometry("300x250")
#####################################
def replicate():
    lb.config(text = "你輸入了 {}".format(tvar.get()))
ttk.Style().configure('TEntry', foreground = 'blue')
ttk.Style().configure('TLabel', foreground = 'brown')

s = '123'
tvar = tk.StringVar()
ent = ttk.Entry(root, textvariable = tvar, 
    font = "Harrington 14 bold", justify = tk.CENTER)#, show = '*')
tvar.set(s)
ent.pack()

btn = ttk.Button(root, text = "Button", command = replicate)
btn.pack()

lb = ttk.Label(root, text = "Label", font = "Times 14 italic")
lb.pack()
#####################################
root.mainloop()