import tkinter as tk
# tkinter 用来写用户界面的工具
# as 重命名
# 1。初始化，新建一个对象
myWindow = tk.Tk()
# 2.窗口的大小，              通过一个元组给一个宽度和高度()
myWindow.geometry("500x500")
# 3.软件的标题
myWindow.title("元气骑士")

a = 0
def click():
    global a # 全局变量
    a = a+1
    if a >= 2:
        a = 0
    la["text"] = "点赞人数%d"%a
    if a == 0:
        la['text']="秀"
    # la["text"] = "点赞人数1"

# 一，标签 Label
la = tk.Label(
    myWindow,
    text = "秀",
    font = (None, 30),
    bg = "pink",  # back ground
    fg = "black", # front ground
    width = 20,   # 宽度
    height = 10,
)
# 放置标签
la.pack()
# 二，按钮 Button
btn = tk.Button(
    myWindow,
    text = "点赞",
    bg = "black",
    fg = "white",
    font=(None, 20),
    width = 5,
    height = 2,
    command = click,
)

# 放置标签
btn.pack()


# 4.循环刷新
myWindow.mainloop()