How to Set a Timer in Python?

You can set a timer in Python by using the time module and creating a countdown function. Here's a breakdown of how to do it:

Steps to Create a Countdown Timer

Import the time module: This module provides time-related functions, including the sleep() function used to pause execution for a specified duration.
```
import time
```
Get User Input: Ask the user to enter the desired countdown duration in seconds.
```
t = int(input("Enter the time in seconds: "))
```
Create a countdown() Function: This user-defined function will handle the timer logic. It takes the countdown time (t) as an argument.
Implement the Countdown Loop: Use a while loop that continues as long as the time (t) is greater than 0.
- Inside the loop, print the remaining time.
- Use the time.sleep(1) function to pause the execution for 1 second (creating the timer effect).
- Decrement the time variable (t -= 1) in each loop iteration.
```
def countdown(t):
    while t:
        mins, secs = divmod(t, 60)
        timer = '{:02d}:{:02d}'.format(mins, secs)
        print(timer, end="\r")
        time.sleep(1)
        t -= 1

    print('Time is up!')
```

Complete Code Example

import time

def countdown(t):
    while t:
        mins, secs = divmod(t, 60)
        timer = '{:02d}:{:02d}'.format(mins, secs)
        print(timer, end="\r")
        time.sleep(1)
        t -= 1

    print('Time is up!')

t = int(input("Enter the time in seconds: "))

countdown(t)

Explanation

The code first imports the time module.
It then asks the user for the countdown duration in seconds and stores it in variable t.
The countdown function uses a while loop that runs until the remaining time, represented by t, is 0.
Inside the loop, it calculates the remaining minutes and seconds using divmod() and formats the time into MM:SS format for display.
The print(timer, end="\r") ensures that the timer display updates in the same line (using a carriage return).
The time.sleep(1) function pauses for 1 second between each loop cycle.
The time t is decremented by 1 in each loop cycle.
When the timer finishes, it prints the message 'Time is up!'.

This approach provides a basic and effective timer implementation using Python's standard time module.