Private attribute

[André]

On Aug 25, 3:47 pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> I have a class with an attribute called 'gridsize' and I want
> a derived class to force and keep it at 0.8 (representing 8mm).
>
> Is this a correct, or the most pythonic approach?
>
> ####################
>
>      def __getattr__(self,attrname):
>          if attrname == 'gridsize':
>              return 0.8
>
>      def __setattr__(self,attrname,value):
>          if attrname == 'gridsize':
>              pass
>          else:
>              self.__dict__[attrname]=value
>
> #####################
>
> Cheers,
> Ken.

Why not make gridsize a property with no set method?

André