get/set

[William Dode]

Le Fri, 10 May 2002 12:03:53 -0500
"Mark McEahern" <marklists at mceahern.com> écrivait:

> [William Dode]
> > coming from java, i use to do a lot of get set method and make all the
> > variable as private.
> >
> > class Toto:
> > 	def getA(self): return self._a
> > 	def setA(self,v): self._a=v
> > 	...
> >
> > Shall i do like that in python ?
> 
> Field descriptors are new with Python 2.2 and require the new-style
> classes. To create a new-style class, simple subclass from object (as
> shown below). Then, you can create properties...
it means that if i want to keep working with python 2.1 i need to use my
own get/set method ?

> 
> class Person(object):
> 
>   def __init__(self):
>     self._first_name = ''
> 
>   def get_first_name(self):
>     return self._first_name
> 
>   def set_first_name(self, value):
>     self._first_name = value
> 
>   first_name = property(get_first_name, set_first_name)
> 
> Obviously, unless I'm doing some validation, there's not much point in
> using properties versus just plain old:
> 
> class Person:
> 
>   def __init__(self):
>     self.first_name = ''
> 
> p = Person()
> p.first_name = "whatever"
> 
> // mark
> 
> 
> 


-- 
William Dodé - Informaticien Indépendant
http://www.flibuste.net