秒表是一种手持式时计，设计用于测量从激活的特定时间到停用该部件时所经过的时间量。设计用于远距离观看的秒表的大型数字版本，如体育场，被称为秒钟。在手动定时中，时钟由按下按钮的人启动和停止。在全自动时间内，传感器会自动触发启动和停止。

必需的模块：我们只会使用tkinter来创建gui，并且在此程序中不会使用其他库。

# Python program to illustrate a stop watch

# using Tkinter

#importing the required libraries

import tkinter as Tkinter

counter = -1

running = False

def counter_label(label):

def count():

if running:

global counter

# To manage the intial delay.

if counter==-1:            

display="Starting..."

else:

display=str(counter)

label['text']=display   # Or label.config(text=display)

# label.after(arg1, arg2) delays by 

# first argument given in milliseconds

# and then calls the function given as second argument.

# Generally like here we need to call the 

# function in which it is present repeatedly.

# Delays by 1000ms=1 seconds and call count again.

label.after(1000, count) 

counter += 1

# Triggering the start of the counter.

count()     

# start function of the stopwatch

def Start(label):

global running

running=True

counter_label(label)

start['state']='disabled'

stop['state']='normal'

reset['state']='normal'

# Stop function of the stopwatch

def Stop():

global running

start['state']='normal'

stop['state']='disabled'

reset['state']='normal'

running = False

# Reset function of the stopwatch

def Reset(label):

global counter

counter=-1