CODEWITHSUNDEEP
pythontimecountdown
AD0T.dev
AD0T.dev

Reputation: 1

How to make a countdown program in python

I am trying to create a countdown in python and I want very simple way of creating that. I watched a couple of videos but couldn't find a right solution for it.

This is the code which I am using right now.

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 Over!!!!')
  
t = input("Enter the time in seconds: ")
  
countdown(int(t))

Upvotes: 0

Views: 682

Answers (1)

Booboo
Booboo

Reputation: 44013

The problem is that when you sleep for 1 second, it will not be for exactly 1 second and theoretically over long enough time the errors could propagate enough such that you could conceivably be printing out an incorrect time. To correct this, your code needs to actually check in its loop how much time has actually elapsed since the start of the program running and use that to compute what the new value of t is, and it should do this frequently so that the countdown is smooth. For example:

import time
  
def countdown(t):
    start_time = time.time()
    start_t = t
    
    # compute accurate new t value aprroximately every .05 seconds:
    while t > 0:
        mins, secs = divmod(t, 60)
        timer = '{:02d}:{:02d}'.format(mins, secs)
        print(timer, end="\r")
        time.sleep(.05) # finer timing
        now = time.time()
        elapsed_time = int(now - start_time) # truncated to seconds
        t = start_t - elapsed_time
      
    print('Time Over!!!!')
  
t = input("Enter the time in seconds: ")
  
countdown(int(t))

Upvotes: 1

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