| 2 | |
| 3 | |
| 4 | class Stopwatch: |
| 5 | def __init__(self): |
| 6 | self.start_time = None |
| 7 | self.end_time = None |
| 8 | |
| 9 | def start(self): |
| 10 | self.start_time = time.time() |
| 11 | |
| 12 | def stop(self): |
| 13 | self.end_time = time.time() |
| 14 | |
| 15 | def elapsed_time(self): |
| 16 | if self.start_time is None: |
| 17 | return 0 |
| 18 | elif self.end_time is None: |
| 19 | return time.time() - self.start_time |
| 20 | else: |
| 21 | return self.end_time - self.start_time |
| 22 | |
| 23 | def __str__(self): |
| 24 | seconds = self.elapsed_time() |
| 25 | hours = int(seconds // 3600) |
| 26 | seconds %= 3600 |
| 27 | minutes = int(seconds // 60) |
| 28 | seconds %= 60 |
| 29 | milliseconds = int((seconds - int(seconds)) * 1000) |
| 30 | seconds = int(seconds) |
| 31 | return f"{hours:02}:{minutes:02}:{seconds:02}.{milliseconds:03}" |