How to create a timer using tkinter

Question

I need to code a program with Python s tkinter library   My major problem is that I don t know how to create a timer or a clock like  hh mm ss    I need it to update itself  that s what I don t know how to do

User · Answer

Python3 clock example using the frame after   rather than the top level application  Also shows updating the label with a StringVar       usr bin env python3    Display UTC    started with https   docs python org 3 4 library tkinter html module-tkinter  import tkinter as tk import time  def current iso8601           Get current date and time in ISO8601          https   en wikipedia org wiki ISO 8601       https   xkcd com 1179      return time strftime   Y m dT H M SZ   time gmtime     class Application tk Frame       def   init   self  master None           tk Frame   init   self  master          self pack           self createWidgets        def createWidgets self           self now   tk StringVar           self time   tk Label self  font   Helvetica   24           self time pack side  top           self time  textvariable     self now          self QUIT   tk Button self  text  QUIT   fg  red                                               command root destroy          self QUIT pack side  bottom              initial time display         self onUpdate        def onUpdate self             update displayed time         self now set current iso8601              schedule timer to call myself after 1 second         self after 1000  self onUpdate   root   tk Tk   app   Application master root  root mainloop

User · Answer

from tkinter import   import time tk Tk   def clock        t time strftime   I  M  S  time localtime        if t              label1 config text t font  times 25       tk after 100 clock  label1 Label tk justify  center   label1 pack   clock   tk mainloop

User · Answer

I have a simple answer to this problem  I created a thread to update the time  In the thread i run a while loop which gets the time and update it  Check the below code and do not forget to mark it as right answer   from tkinter import   from tkinter import   import  thread import time   def update        while True        t time strftime   I  M  S  time localtime          time label  text     t    win   Tk   win geometry  200x200    time label   Label win  text  0 0 0   font     15   time label pack      thread start new thread update      win mainloop

User · Answer

The root after ms  func  is the method you need to use  Just call it once before the mainloop starts and reschedule it inside the bound function every time it is called  Here is an example   from tkinter import   import time   def update clock        timer label config text time strftime   H  M  S  time localtime                       font  Times 25      change the text of the time label according to the current time     root after 100  update clock     reschedule update clock function to update time label every 100 ms  root   Tk      create the root window timer label   Label root  justify  center      create the label for timer timer label pack      show the timer label using pack geometry manager root after 0  update clock     schedule update clock function first call root mainloop      start the root window mainloop

User · Answer

from tkinter import    from tkinter import messagebox  root   Tk    root geometry  400x400    root resizable 0  0   root title  Timer    seconds   21  def timer         global seconds     if seconds  gt  0          seconds   seconds - 1         mins   seconds    60         m   str mins           if mins  lt  10              m    0    str mins          se   seconds -  mins   60          s   str se           if se  lt  10              s    0    str se          time set m         s          timer display config textvariable time            call this function again in 1 000 milliseconds         root after 1000  timer       elif seconds    0          messagebox showinfo  Message    Time is completed           root quit     frames   Frame root  width 500  height 500   frames pack    time   StringVar    timer display   Label root  font   Trebuchet MS   30   bold     timer display place x 145  y 100   timer      start the timer  root mainloop

User · Answer

Tkinter root windows have a method called after which can be used to schedule a function to be called after a given period of time  If that function itself calls after you ve set up an automatically recurring event    Here is a working example     for python 3 x use  tkinter  rather than  Tkinter  import Tkinter as tk import time  class App        def   init   self           self root   tk Tk           self label   tk Label text             self label pack           self update clock           self root mainloop        def update clock self           now   time strftime   H  M  S           self label configure text now          self root after 1000  self update clock   app App     Bear in mind that after doesn t guarantee the function will run exactly on time  It only schedules the job to be run after a given amount of time  It the app is busy there may be a delay before it is called since Tkinter is single-threaded  The delay is typically measured in microseconds

User · Answer

I just created a simple timer using the MVP pattern  however it may be  overkill for that simple project   It has quit  start pause and a stop button  Time is displayed in HH MM SS format  Time counting is implemented using a thread that is running several times a second and the difference between the time the timer has started and the current time   Source code on github

[python] How to create a timer using tkinter?

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