[Tutor] question about __init__ in a class

[shawn bright]

Thats a lot better, thanks, will use it like that.
-shawn

On 11/13/06, Mike Hansen <Mike.Hansen at atmel.com> wrote:
>
>
>
> > -----Original Message-----
> > From: tutor-bounces at python.org
> > [mailto:tutor-bounces at python.org] On Behalf Of shawn bright
> > Sent: Monday, November 13, 2006 11:45 AM
> > To: tutor-python
> > Subject: [Tutor] question about __init__ in a class
> >
> > Hello there all.
> > i have a class that i need to load some class variables
> > depending on what is passed to the class, it would either be
> > set up using one variable or another. The values for the
> > class variables would be loaded from a database. But how it
> > is looked up depends on how its called. Like this:
> >
> > class Sensor_Object(object):
> >     def __init__(self, id, monitor):
> >         if id:
> >            self.id = id
> >            load values from the database
> >            value1 = somevalue
> >            value2 = someOthervalue
> >         else:
> >            self.monitor = monitor
> >            get some values from database
> >            value1 = somevalue
> >            value2 = someothervalue
> >
> > now i could call it like this:
> >
> > new_monitor = sensor.Sensor('', 'XJ191')
> > or
> > new_monitor = sensor.Sensor('3433', '')
> > to load based on the other variable.
> >
> > i think that this would work, but i was thinking that there
> > must be a cleaner way to do it.
> > any suggestions ?
> >
> > sk
>
> I don't know if it's cleaner, but it might be easier to read if you use
> default named arguments.
> def __init__(self, id = None, monitor = None):
>
> Calling it
> new_monitor = sensor.Sensor(monitor = 'XJ191')
> new_monitor = sensor.Sensor(id = '3433')
>
> Check to make sure one or the other arguments is supplied. Otherwise
> throw an exception.
>
> Maybe there'll be some better ideas from other posters.
>
> Mike
>
>
>
>
>
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