Introduction

In this tutorial we will create a How to Create a Countdown Timer in Python. This tutorial purpose is to provide a countdown timer for triggering any event. This will cover all the basic parts for creating the countdown timer. I will provide a sample program to show the actual coding of this tutorial.

This tutorial will make it easy for you to understand the coding just follow my instruction I provided and you can do it without a problem. This program is very useful when you want to trigger any event that needed timer. I will try my best to give you the easiest way of creating this program Countdown Timer in python. So let's do the coding.

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Importing Modules

from tkinter import *

Setting up the Main Frame

root = Tk()
root.title("Countdown Timer")
width = 500
height = 400
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()
x = (screen_width/2) - (width/2)
y = (screen_height/2) - (height/2)
root.geometry("%dx%d+%d+%d" % (width, height, x, y))
root.resizable(0, 0)

Creating Main Function

def countdown(count):
    lbl_text['text'] = count
    if count > 0:
        root.after(1000, countdown, count-1)
    elif(count == 0):
        global NewForm
        NewForm = Toplevel() 
        NewForm.title("Countdown Timer")
        width = 500
        height = 300
        screen_width = root.winfo_screenwidth()
        screen_height = root.winfo_screenheight()
        x = (screen_width/2) - (width/2)
        y = (screen_height/2) - (height/2)
        NewForm.geometry("%dx%d+%d+%d" % (width, height, x, y))
        NewForm.resizable(0, 0)
        lbl_blast = Label(NewForm, text="TIME EXPIRED!", font=('arial', 50))
        lbl_blast.pack(fill=BOTH, pady=100)
        btn_back = Button(NewForm, text="Reset", font=('arial', 16), command=BackBtn)
        btn_back.pack(side=TOP)
 
 
def StartCountdown():
    countdown(20)
    btn_toggle.config(state=DISABLED)
 
 
def BackBtn():
    NewForm.destroy()
    btn_toggle.config(state=NORMAL)
    lbl_text.config(text="20")

In the given code we first create a method called countdown(), it will start the countdown process using the after() function. Then we create a method that will trigger the countdown() function to start the timer called StartCountdown().

Designing the Layout

Top = Frame(root, width=500, bd=1, relief=SOLID)
Top.pack(side=TOP)
TextField = Frame(root)
TextField.pack(side=TOP)
BtnGroup = Frame(root, width=500)
BtnGroup.pack(side=BOTTOM)
 
lbl_title = Label(Top, width=500, text="COUNTDOWN TIMER", font=('times new roman', 16))
lbl_title.pack(fill=X)
lbl_text = Label(TextField, text="20", font=('arial', 200))
lbl_text.pack(fill=BOTH) 
 
btn_toggle = Button(BtnGroup, text="Start", command=StartCountdown)
btn_toggle.pack()

Initializing the Application

After finishing the function save the application as index.py. This function will run the code and check if the main is initialize properly. To do that copy and write these block code after the main function inside the IDLE text editor.

if __name__ == '__main__':
    root.mainloop()

Output:

The How to Create Countdown a Timer in Python source code that I provide can be download below. Please kindly click the download button.

There you have it we successfully created How to Create a Countdown Timer in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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