[Python-Dev] Default metaclass in Python 3.0 modules (was: PEP: Consolidating names and classes in the `unittest` module (updated 2008-07-15))

Ben Finney ben+python at benfinney.id.au
Tue Jul 15 12:04:33 CEST 2008

"Benjamin Peterson" <musiccomposition at gmail.com> writes:

> On Mon, Jul 14, 2008 at 6:42 PM, Ben Finney <ben+python at benfinney.id.au> wrote:
> > The `unittest` module will gain the following attribute, to set the
> > default metaclass for classes in the module and thus make all classes
> > in the module part of the new-style type hierarchy::
> >
> >    __metaclass__ = type
> It's already done.
> Line 94-95 in unittest.py (trunk):
> # All classes defined herein are 'new-style' classes, allowing use of 'super()'
> __metaclass__ = type

Hmm, you're right; I see that in Python 2.5.2 'unittest.py'.

Why is it not there in 3.0's 'unittest.py'? Is this achieved some
other way?

 \         “Pinky, are you pondering what I'm pondering?” “I think so, |
  `\     Brain, but if they called them ‘Sad Meals’, kids wouldn't buy |
_o__)                                    them!” —_Pinky and The Brain_ |
Ben Finney

More information about the Python-Dev mailing list