Bug? If not, how to work around it?

Steven Taschuk staschuk at telusplanet.net
Thu Aug 7 03:43:08 CEST 2003


Quoth Mark Day:
  [...]
> I'm guessing that iter() is looking for an __iter__ attribute without
> going through __getattr__ to find it.  [...]

Right.  This is normal for special methods when invoked by special
notations (e.g., __len__ invoked by way of len(), __add__ invoked
by way of +, etc.).

> [...] So, I tried adding the following
> method to the Test class:
> 
>     def __iter__(self):
>         return self.__obj.__iter__

Well, you have to actually call __iter__ to get the iterator:

    def __iter__(self):
        return self.__obj.__iter__()

(This makes iter(testobj) not quite the same as
iter(testobj.__obj) for new-style instances, mind you.)

-- 
Steven Taschuk                  staschuk at telusplanet.net
"Telekinesis would be worth patenting."  -- James Gleick





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