In [1]:

    

class Time:
    def __init__(self, hour=0, minute=0, second=0):
        self.hour = hour
        self.minute = minute
        self.second = second
            
    def __str__(self):
        return "{:02d}:{:02d}:{:02d}".format(self.hour, self.minute, self.second)
    
    def __add__(self, other):
        if isinstance(other, Time):
            return self.add_time(other)
        else:
            return self.increment(other)
        
    def __radd__(self, other):
        return self.__add__(other)
    
    def time_to_int(self):
        minutes = self.hour * 60 + self.minute
        seconds = minutes * 60 + self.second
        return seconds
    
    def add_time(self, other):
        seconds = self.time_to_int() + other.time_to_int()
        return int_to_time(seconds)
    
    def increment(self, seconds):
        seconds += self.time_to_int()
        return int_to_time(seconds)


    

In [2]:

    

def int_to_time(seconds):
    time = Time()
    minutes, time.second = divmod(seconds, 60)
    time.hour, time.minute = divmod(minutes, 60)
    return time


    

In [3]:

    

t = Time()
print(t)


    

    




00:00:00

In [4]:

    

start = Time(9, 45)
duration = Time(1, 35)
print(start + duration)


    

    




11:20:00

In [5]:

    

print(1337 + start)


    

    




10:07:17

In [6]:

    

print(vars(start))


    

    




{'hour': 9, 'minute': 45, 'second': 0}