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

Nick Coghlan ncoghlan at gmail.com
Thu May 24 05:49:08 CEST 2012

On Thu, May 24, 2012 at 11:02 AM, Eric V. Smith <eric at trueblade.com> wrote:

On 5/23/2012 8:58 PM, PJ Eby wrote:

OTOH, that's finders, and I think we're dealing with loaders here. Splitting hairs, perhaps, but at least it's in a good cause.  ;-) I guess I could store the passed-in parent path, and use that if it can't be found through sys.modules. I'm not sure I can conjure up code to test this.

I don't think there's a need to change anything from your current strategy, but we should be clear in the docs:

  1. Finders should not assume their parent packages have been loaded (and should not load them implicitly)
  2. Loaders can assume their parent packages have already been loaded and are present in sys.modules (and can complain if they're not there)

Cheers, Nick.

-- Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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