class Time:
    def __init__(self, hour, min):
        self.hour = hour
        self.min = min

    def print24h(self):
        print("{:2}:{:2}".format(self.hour, self.min))

    def print12h(self):
        if self.hour < 12:
            ampm = "am"
        else:
            ampm = "pm"

        print("{:2}:{:2} {}".format(self.hour % 12,
                                    self.min, ampm))

if __name__ == "__main__":
    t = Time(15, 45)

    print("print as 24h: "),
    t.print24h()
    print("print as 12h: "),
    t.print12h()

    print("These are attributes of the time object t:")
    print(dir(t))

    print("The time is %d hours and %d minutes." % (t.hour, t.min))