[Python-Dev] class name spaces inside an outer function (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Sun Apr 28 03:26:28 CEST 2013

On 28 Apr 2013 04:30, "Ethan Furman" <ethan at stoneleaf.us> wrote:

I filed bug http://bugs.python.org/issue17853 last night. If somebody could point me in the right direction (mainly which files to look in), I'd be happy to attempt a patch.

Hmm, interesting challenge. A key part of the problem is that the 3.x compiler assumes there's no way to inject names it doesn't know about into code inside a function - we missed the fact that you could still do it with a nested class and a metaclass prepare method.

I suspect resolving it sensibly will require a new opcode that tries a local-only load and then falls back to loading from a cell rather than from a global/builtins lookup.

Cheers, Nick.

-- Ethan

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