Re: [Python-Dev] No __bases__ in dir()

[Terry Reedy]

"Guido van Rossum" <[EMAIL PROTECTED]> wrote in message 
news:[EMAIL PROTECTED]
| In Py3k, dir() will allow any class to makes its instances special
| cases by defining __dir__().

Nice.  Then the current special case will become explainable as 
type.__dir__ excluding type's numerous attibutes, to avoid clutter, and we 
should have fewer discussions about what dir() 'ought' to return ;-) 



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Re: [Python-Dev] No __bases__ in dir()

[Guido van Rossum]

On Sat, Mar 15, 2008 at 1:11 PM, Nick Coghlan <[EMAIL PROTECTED]> wrote:
> Guido van Rossum wrote:
>  > This is because dir() special-cases classes, isn't it?
>
>  Avoiding infinite recursion in dir(type) might be fun if that special
>  case was removed without due care and attention...

I wasn't suggeting removing the special-casing -- rather I was
explaining the observed behavior.

In Py3k, dir() will allow any class to makes its instances special
cases by defining __dir__().

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)
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Re: [Python-Dev] No __bases__ in dir()

[Nick Coghlan]

Guido van Rossum wrote:
> This is because dir() special-cases classes, isn't it?

Avoiding infinite recursion in dir(type) might be fun if that special 
case was removed without due care and attention...

Cheers,
Nick.

-- 
Nick Coghlan   |   [EMAIL PROTECTED]   |   Brisbane, Australia
---
 http://www.boredomandlaziness.org
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Re: [Python-Dev] No __bases__ in dir()

[Guido van Rossum]

This is because dir() special-cases classes, isn't it?

On Sat, Mar 15, 2008 at 11:09 AM, Christian Heimes <[EMAIL PROTECTED]> wrote:
> > Why __bases__ does not appear in dir()?
>  >
>  > Is there a good reason for this or should I file a bug?
>
>  __bases__ and several other methods like mro and __subclasses__ are
>  defined on the meta class. dir() doesn't list the attributes of the meta
>  class of a class.
>
>
>  >>> class C(object):
>  ... pass
>  ...
>  >>> dir(type(C))
>  ['__base__', '__bases__', '__basicsize__', '__call__', '__class__',
>  '__cmp__', '__delattr__', '__dict__', '__dictoffset__', '__doc__',
>  '__flags__', '__getattribute__', '__hash__', '__init__', '__itemsize__',
>  '__module__', '__mro__', '__name__', '__new__', '__reduce__',
>  '__reduce_ex__', '__repr__', '__setattr__', '__str__', '__subclasses__',
>  '__weakrefoffset__', 'mro']
>
>  Christian
>
>
>
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-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)
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Re: [Python-Dev] No __bases__ in dir()

[Christian Heimes]

> Why __bases__ does not appear in dir()?
> 
> Is there a good reason for this or should I file a bug?

__bases__ and several other methods like mro and __subclasses__ are
defined on the meta class. dir() doesn't list the attributes of the meta
class of a class.


>>> class C(object):
... pass
...
>>> dir(type(C))
['__base__', '__bases__', '__basicsize__', '__call__', '__class__',
'__cmp__', '__delattr__', '__dict__', '__dictoffset__', '__doc__',
'__flags__', '__getattribute__', '__hash__', '__init__', '__itemsize__',
'__module__', '__mro__', '__name__', '__new__', '__reduce__',
'__reduce_ex__', '__repr__', '__setattr__', '__str__', '__subclasses__',
'__weakrefoffset__', 'mro']

Christian

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[Python-Dev] No __bases__ in dir()

[Facundo Batista]

Hi!

My head crashed into this:

>>> class C(object):
   ...: pass
   ...:
>>>
>>> dir(C)
['__class__', ...]
>>> C.__bases__
(,)

Why __bases__ does not appear in dir()?

Is there a good reason for this or should I file a bug?

Thanks!

-- 
.Facundo

Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/
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