how do i create such a thing?

[Pedro Werneck]

Hi,

If you need direct access to some atribute, use object.__getattribute__.


>>> class DefaultAttr(object):
...     def __init__(self,  default):
...         self.default = default
...     def __getattribute__(self, name):
...         try:
...             value = object.__getattribute__(self, name)
...         except AttributeError:
...             value = self.default
...         return value
... 
>>> x = DefaultAttr(99)
>>> 
>>> print x.a
99
>>> x.a = 10
>>> print x.a
10
>>> 



On Sun, 30 Jan 2005 13:54:38 -0800
Lowell Kirsh <lkirsh at cs.ubc.ca> wrote:

> I want to create a class called DefaultAttr which returns a default 
> value for all attributes which haven't been given values yet. It will 
> work like this:
> 
>  >> x = DefaultAttr(99)
>  >> print x.foo
> 99
>  >> print x.bar
> 99
>  >> x.foo = 7
>  >> print x.foo
> 7
> 
> I already have a similar class called DefaultDict which works
> similarly  which I assume would be a good thing to use.
> 
> Lowell
> -- 
> http://mail.python.org/mailman/listinfo/python-list