hasattr + __getattr__: I think this is Python bug

[Bruno Desthuilliers]

Ethan Furman a écrit :
> Bruno Desthuilliers wrote:
>> Duncan Booth a écrit :
(snip)

>>> Or you could create the default as a class attribute 
>>
>> from the OP:
>> """
>> I have a class (FuncDesigner oofun) that has no attribute "size", but
>> it is overloaded in __getattr__, so if someone invokes
>> "myObject.size", it is generated (as another oofun) and connected to
>> myObject as attribute.
>> """
>>
>> so this solution won't obviously work in this case !-)
>>
>> Also and FWIW, I wouldn't advocate this solution if the "default" 
>> class attribute is of a mutable type.
> 
> Well, it is Monday, so I may be missing something obvious, but what is 
> the effective difference between these two solutions?


Now it's Tuesday !-)


Ok, let's see:

Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> class Foo(object):
...     whatever = Foo()
...
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "<stdin>", line 2, in Foo
NameError: name 'Foo' is not defined
 >>>