text: Stopwatch in Python
  bluepaperbirds
  ・2 min read
  In Python you can use the time module to wait (you can also get the time and date). To be explicit, the time module provides various time-related functions.
  This is very useful for many applications. If you make a game, it should not update every millisecond. If you make weather station software, it makes no sense to update in such a short time. For an alarm clock app, you need it to wait.
  Lets say you want to make a stopwatch, without the program pausing there would be no way to create one.
  Sleep function
  The module time has a function named sleep, which pauses the program (it complete freezes the program).
  time.sleep(t)
  This waits for t number of seconds. Consider this program which waits for one second before it outputs the next word.
  import time.sleep print("Hello") time.sleep(1) print("World")
  Stopwatch
  So you can use the time.sleep() function to pause the program. But a stopwatch doesn't have a limit, it needs to go on. For that, you can use a while loop. Then you can use Ctrl+c to exit the program.
  import time while True: print("Clock ticks") time.sleep(1)
  If you run the above program it outputs:
  ➜ ~ python3 stopwatch.py Clock ticks Clock ticks Clock ticks
  Until you press Ctrl+c. Now it needs to count seconds, you can use time.time() to get the current time.
  The example below will output every second passed until Ctrl+C is passed.
  import time start = time.time() while True: time.sleep(1) total_secs = round(time.time() - start) print(total_secs)
  Formatting
  To format it you can use f-strings with two digits. With a simple calculation you can get the minutes and seconds.
  import time start = time.time() while True: time.sleep(1) total_secs = round(time.time() - start) minute = round(total_secs / 60) seconds = round(total_secs % 60) s = f"{minute:02d}:{seconds:02d}" print(s)
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