[Python-Dev] Adding types.build_class for 3.3

[Georg Brandl]

On 05/07/2012 01:10 PM, Nick Coghlan wrote:
> A while back I pointed out that there's no easy PEP 3115 compliant way
> to dynamically create a class (finding the right metaclass, calling
> __prepare__, etc).
> 
> I initially proposed providing this as operator.build_class, and
> Daniel Urban created a patch that implements that API
> (http://bugs.python.org/issue14588).
> 
> However, in starting to write the documentation for the new API, I
> realised that the operator module really isn't the right home for the
> functionality.
> 
> Instead, I'm now thinking we should add a _types C extension module
> and expose the new function as types.build_class(). I don't want to
> add an entire new module just for this feature, and the types module
> seems like an appropriate home for it.

Yay for being able to get rid of the stupidities the types module goes
through to get at its types (i.e. if we start having a C module, the
whole contents can go there.)

As for build_class: at the moment the types module really only has types,
and to add build_class there is just about as weird as in operator IMO.

cheers,
Georg