[Python-Dev] advice needed: best approach to enabling "metamodules"?

[Ethan Furman]

On 11/30/2014 11:15 AM, Guido van Rossum wrote:
> On Sun, Nov 30, 2014 at 6:15 AM, Brett Cannon wrote: 
>> On Sat, Nov 29, 2014, 21:55 Guido van Rossum wrote:
>>> 
>>> All the use cases seem to be about adding some kind of getattr hook
>>> to modules. They all seem to involve modifying the CPython C code
>>> anyway. So why not tackle that problem head-on and modify module_getattro()
>>> to look for a global named __getattr__ and if it exists, call that instead
>>> of raising AttributeError?
>> 
>> Not sure if anyone thought of it. :) Seems like a reasonable solution to me.
>> Be curious to know what the benchmark suite said the impact was.
> 
> Why would there be any impact? The __getattr__ hook would be similar to the
> one on classes -- it's only invoked at the point where otherwise AttributeError
> would be raised.

I think the bigger question is how do we support it back on 2.7?

--
~Ethan~

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