Chris Rebert wrote:
> On Mon, Jun 15, 2009 at 5:43 AM, Virgil Stokes<v...@it.uu.se> wrote:
>> Does anyone have a good example (or examples) of when "property(...)" can be
>> useful?
>
> Erm, when you want to create a property (i.e. computed attribute).
>
> from __future__ import division
> class TimeDelta(object):
> def __init__(self, secs):
> self. seconds =secs
>
> @property
> def minutes(self):
> return self.seconds/60
>
> @property
> def hours(self):
> return self.minutes/60
>
> @property
> def days(self):
> return self.hours/24
>
> td = TimeDelta(55555555555)
> print td.days, "days", "=", td.hours, "hours", "=", td.minutes, "minutes"
>
> Cheers,
> Chris
Python's property is better than just that...
from __future__ import division
class TimeDelta(object):
def __init__(self, secs):
self. seconds =secs
@property
def minutes(self):
return self.seconds
@minutes.setter
def minutes(self, value
self.seconds = 60 * value
@property
def hours(self):
return self.minutes/60
@hours.setter
def hours(self, value):
self.minutes = 60 * value
@property
def days(self):
return self.hours/24
@days.setter
def days(self, value):
self.hours = 24 * value
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