André wrote:
On Aug 25, 3:47 pm, Ken Starks <[EMAIL PROTECTED]> 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

Thanks for the suggestion, André.

I admit I haven't used properties, and had to look them up.
Pretty cool indeed !  But an extra unnecessary level of
complexity for my needs here, I feel.

They are _certainly_ going to become part of my
Python toolkit.


Cheers,
Ken.
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