OOP with MyTime

kjakupak at gmail.com kjakupak at gmail.com
Thu Jul 3 14:51:45 CEST 2014


On Wednesday, July 2, 2014 4:02:00 PM UTC-4, MRAB wrote:
> >
> 
> If you want 'between' to be an instance method of the MyTime class, it
> 
> needs 'self' as well as the 2 arguments 't1' and 't2'.
> 
> 
> 
> You can then compare the hours, minutes and seconds of self against
> 
> those of t1 and t2:
> 
> 
> 
>      def between(self, t1, t2):
> 
>          return (t1.hours, t1.minutes, t1.seconds) <= (self.hours, 
> 
> self.minutes, self.seconds) and (self.hours, self.minutes, self.seconds) 
> 
> <= (t2.hours, t2.minutes, t2.seconds)
> 
> 
> 
> That could be shortened further using chained comparisons.
> 
> 
> 
> Note that the code assumes that the times t1 and t2 are ordered, i.e.
> 
> that time t1 is not later/greater than time t2.

So I've now gotten this:
class MyTime:

    def __init__(self, hrs=0, mins=0, secs=0):
        self.hours = hrs
        self.minutes = mins
        self.seconds = secs

        if self.seconds >= 60:
            self.minutes += self.seconds // 60
            self.seconds = self.seconds % 60

        if self.minutes >= 60:
            self.hours += self.minutes // 60
            self.minutes = self.minutes % 60

        if self.hours >= 24:
            self.hours = self.hours % 24

    def get_sec(self):
        return (self.hours * 60 + self.minutes) * 60 + self.seconds

    def __str__(self):
        return "{:02d}:{:02d}:{:02d}".\
               format(self.hours, self.minutes, self.seconds)

    def between(self, t1, t2):
        return (t1.hours, t1.minutes, t1.seconds) <= (self.hours, self.minutes, self.seconds) and (self.hours, self.minutes, self.seconds) <= (t2.hours, t2.minutes, t2.seconds)


t1 = MyTime(9, 59, 59)
print("t1 =", t1)

t2 = MyTime(10, 0, 1)
print("t2 =", t2)

t3 = MyTime(10, 0, 0)
print("t3 =", t3)

print("between(t2, t3, t1) =", between(t2, t3, t1))
print("between(t1, t3, t2) =", between(t1, t3, t2))
print("between(t3, t1, t2) =", between(t3, t1, t2))
print("between(t1, t2, t3) =", between(t1, t2, t3))

Am I on the right track or? Not sure where to go from here



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