[Python-3000] Change to class construction? (original) (raw)

Phillip J. Eby pje at telecommunity.com
Tue Jul 10 02:13:56 CEST 2007

At 11:56 PM 7/9/2007 +0300, Guido van Rossum wrote:

The use of the word "mapping" might easily be construed as implementing abc.Mapping, and then iteration and reading the contents would be well-defined.

I'm not sure which use of the word "mapping" you're talking about. PEP 3115 is explicit that there is no specific requirements for the prepare()'d namespace; it just mentions some things that might be useful to have in such an object.

So, in order to replace it with a view or something, we'd want to change the PEP to explicitly document what is required.

Personally, I'd just as soon make it explicitly official that locals() in a class suite gives you the prepare()'d object, whatever it is. If a given Python implementation can support PEP 3115 in the first place, then it clearly knows what object to return. ;-)

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