input/ldompeling at casema.nl: > Yes, I would like seconds since start of program. > Can I not doing something like time()=0 only this gives an error. Here: class MyReckoning: def __init__(self): self.the_beginning = time.time() def time(self): return time.time() - self.the_beginning reckoning = MyReckoning() print(reckoning.time()) Marko