计数器和类计数器是编程工作中常用的功能之一。今天分享一个python计数器编制方法，供大家参考。上代码：
from tkinter import *
def counter():
global s
s = s
if s:
Num.set(Num.get()+1)
root.after(16,counter)
else:
s = not s
def stop():
global s
s = not s
root = Tk()
root.geometry('600x300')
Num = IntVar()
global s
s = False
lb1 = Label(root,textvariable=Num,bg='lightyellow',height=2,font=('黑体 66'))
lb1.pack(fill=BOTH)
bt1 = Button(root,text='开始',command = counter).pack()
bt2 = Button(root,text='停止',command = stop).pack()
counter()
root.mainloop()运行结果截图
