Bug? If not, how to work around it?
op73418 at mail.telepac.pt
Thu Aug 7 01:57:30 CEST 2003
On 6 Aug 2003 19:35:18 -0400, aahz at pythoncraft.com (Aahz) wrote:
>In article <u8m2jvsus3om8r96ggnej9s7u3iecv3e29 at 4ax.com>,
>Gonçalo Rodrigues <op73418 at mail.telepac.pt> wrote:
>>>>> class Test(object):
>>... def __init__(self, obj):
>>... self.__obj = obj
>>... def __getattr__(self, name):
>>... return getattr(self.__obj, name)
>>>>> a = Test()
>><method-wrapper object at 0x0112CF30>
>>Traceback (most recent call last):
>> File "<interactive input>", line 1, in ?
>>TypeError: iteration over non-sequence
>>Is this a bug? If not, how to code Test such that iter sees the
>>__iter__ of the underlying object?
>As Mark guessed, iter() goes directly to the attribute rather than using
>the __getattr__ machinery of the class. However, you can intercept it
>using a metaclass, but that requires a bit of fancy footwork to reach
>down into the instance to get self.__obj.
Actually I came across this because of a little metaclass I was
coding. And my head hurts already as it is...
So, is it a bug? In other words, should I open a bug report?
With my best regards,
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