[Python-Dev] Making directories and zip files executable (original) (raw)

Guido van Rossum guido at python.org
Wed Sep 12 20:39:36 CEST 2007

On 9/12/07, Nick Coghlan <ncoghlan at gmail.com> wrote:

Guido van Rossum wrote: > I could use a refresher on how PJE's patch solves Andy's problem.

I'm not sure if you're asking about how you would execute a zip file after the patch has been applied, or about the mechanics of how the patch works. PJE's last post covered the former question, so I'll cover the gist of the latter. The patch works by passing the script argument to the import machinery to see if it is recognised as a valid sys.path entry (i.e. either a directory or a zip file in a default Python installation).

Ah, this is the crux! I didn't understand Phillips wording of "an importable path". I still didn't understand your wording "recognised as a valid sys.path entry"; both wordings suggest a link between sys.argv[0] and the current value of sys.path, which isn't the case -- it is whether they are recognized by the "meta import hook"! This only became clear after I re-read the patch with Phillip's and your words in the back of my head.

I now like and approve of the patch, and said so on the tracker.

--Guido

If it is, then add that location to the front of sys.path and use the -m switch support to execute the "main" module directly.

If the filename passed in isn't recognised as a sys.path entry, then it is executed as a script as normal. Cheers, Nick. -- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia --------------------------------------------------------------- http://www.boredomandlaziness.org

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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