Multiple Timers

[Yoriz]

The Gui would be responsible for calling the method get_duration every update interval.

import datetime
import time


class Timer:
    def __init__(self):
        self.timedelta = datetime.timedelta()
        self.running = False

    def start(self):
        self.start_time = datetime.datetime.now()
        self.running = True

    def stop(self):
        if not self.running:
            return
        self.timedelta += datetime.datetime.now() - self.start_time
        self.running = False

    def reset(self):
        self.timedelta = datetime.timedelta()
        self.running = False

    def get_duration(self):
        duration = self.timedelta
        if self.running:
            duration += datetime.datetime.now() - self.start_time
        return duration


timer = Timer()
timer2 = Timer()
timer.start()
timer2.start()
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')
timer2.stop()
print('Timer2 stopped')
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')
timer2.start()
print('Timer2 started')
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')
timer.reset()
timer.start()
print('timer1 reset & restarted')
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')
time.sleep(1)
print(f'Timer1: {timer.get_duration()}')
print(f'Timer2: {timer2.get_duration()}')

Output:
Timer1: 0:00:01.000916
Timer2: 0:00:01.000916
Timer1: 0:00:02.001026
Timer2: 0:00:02.001026
Timer2 stopped
Timer1: 0:00:03.001449
Timer2: 0:00:02.001026
Timer2 started
Timer1: 0:00:04.001503
Timer2: 0:00:03.001080
Timer1: 0:00:05.001634
Timer2: 0:00:04.001211
timer1 reset & restarted
Timer1: 0:00:01.000573
Timer2: 0:00:05.001784
Timer1: 0:00:02.001267
Timer2: 0:00:06.002478