import time

class Timer:

def __init__(self, timeout):

self.timeout = timeout

self.start = time.time()

def done(self):

return time.time() - self.start > self.timeout

def on_timer_done(self, callback):

self.callback = callback

if __name__ == "__main__":

### First try

timer = Timer(1.0)

timer.on_timer_done(lambda: print("Timer is done!"))

while True:

if timer.done():

timer.callback()

break

### Second try

# timers = []

#

# timer1 = Timer(1.0)

# timer1.on_timer_done(lambda: print("First timer is done!"))

#

# timer2 = Timer(2.0)

# timer2.on_timer_done(lambda: print("Second timer is done!"))

#

# timers.append(timer1)

# timers.append(timer2)

#

# while True:

# for timer in timers:

# if timer.done():

# timer.callback()

# timers.remove(timer)

#

# # If no more timers are left, we exit the loop

# if len(timers) == 0:

# break