'''Button按钮 点击执行对应的命令'''

 import tkinter as tk

 #初始化窗口

 window = tk.Tk()

 #窗口名称

 window.title("My Window")

 #窗口大小,是 x 不是 *

 window.geometry("400x400")

 #创建对象num，用来计数

 num = 0

 label = tk.Label(window,text="Hello World",height=2,width=20,fg="green")

 label.pack()

 def hit_me():

     #使用全局变量

     global num

     num = num + 1

     text = "you hit " + str(num)

     #配置label的属性

     label.config(text=text)

 def forget_button():

     button.forget()

 # 创建按钮,这里的command是调用事件

 def b_pack():

     button.pack()

 button = tk.Button(window,text="hit_me",fg="red",command=hit_me)

 button.pack()

 # 使button不可显示

 b_forget = tk.Button(window,text="forget_button",command=forget_button)

 b_forget.pack()

 # 再次使button显示

 button_p = tk.Button(window,text="button_pack",command=b_pack).pack()

 # 循环窗口

 window.mainloop()