Callable assertion?

[Alex Martelli]

Greg Ewing (using news.cis.dfn.de) wrote:

> Erik Max Francis wrote:
>> "Gonçalo Rodrigues" wrote:
>> 
>>>Definitely yes. There are a few strange objects that are callable and
>>>do not have a __call__.
>> 
>> I wouldn't call class objects all that strange :-).

_CLASSIC_ classes are very strange indeed, for backwards compat.


> It is strange behaviour, though, considering
> 
>  >>> class C:
> ...  pass
> ...
>  >>> type(C).__dict__.keys()
> ['__delattr__', '__setattr__', '__repr__', '__call__', '__str__',
> '__getattribute__', '__new__']
> 
> so according to C's type, it *should* have a __call__ method.
> I'm not sure exactly what's going on here.

BW compat -- type(C) (i.e <type 'classobj'>) is the weirdest
little beast in Pythonland.

Use newstyle classes only and keep your sanity...:
 
>>> class C(object): pass
...
>>>
>>> C.__call__
<method-wrapper object at 0x402ded8c>
>>>


Alex