On 2014-07-03 13:51, kjaku...@gmail.com wrote:
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
You need to decide whether you want 'between' to be a method of the
MyTime class or a separate function.
In the above code it's defined as a method, so you can say:
t2.between(t3, t1)
which means "is t2 between t3 and t1?".
That would return False because t3 is greater than t1, but:
t2.between(t1, t3)
would return True.
(I _did_ say that it assumes that the times are ordered.)
BTW, gmail is messing up your messages. This will tell you how to fix
it:
https://wiki.python.org/moin/GoogleGroupsPython
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