[Python-Dev] PEP 420 - dynamic path computation is missing rationale (original) (raw)

Eric V. Smith eric at trueblade.com
Wed May 23 15:10:42 CEST 2012

On 05/23/2012 09:02 AM, Nick Coghlan wrote:

On Wed, May 23, 2012 at 10:31 PM, Eric V. Smith <eric at trueblade.com> wrote:

On 05/22/2012 09:49 PM, PJ Eby wrote:

It shouldn't - all you should need is to use getattr(sys.modules[self.modname], self.attr) instead of referencing a parent path object directly.

The problem isn't the lookup, it's coming up with self.modname and self.attr. As it currently stands, PathFinder.findmodule is given the parent path, not the module name and attribute name used to look up the parent path using sys.modules and getattr. Right, that's what PJE and I were discussing. Instead of passing in the path object directly, you can instead pass an object that lazily retrieves the path object in its iter method:

Hey, one message at a time! I'm just reading those now.

I'd like to hear Brett's comments on this approach.

Eric.

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