python tkinter button

 '''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()