Message164913
| Author |
eric.snow |
| Recipients |
Arfrever, Marc.Abramowitz, Ronan.Lamy, brett.cannon, chris.jerdonek, eric.smith, eric.snow, pnasrat, python-dev |
| Date |
2012年07月07日.17:10:53 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<1341681054.2.0.880429176101.issue14982@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
Importers are a PEP 302 API. In the context of pkgutil, they are path hooks (see http://www.python.org/dev/peps/pep-0302/#id24), aka path importers. A path hook is a callable that takes a path and returns a finder. Path hooks are stored in sys.path_hooks and the finder resulting from a matching path importer is stored in sys.path_importer_cache.
pkgutil also refers to PEP 302 finders as "importers". To be honest, the import-related nomenclature is a mess.
While you can use pkgutil.ImpImporter as a path hook, instances can also be used as metapath hooks; if you don't pass anything to ImpImporter, the resulting object acts more like a PEP 302 metapath hook that wraps the "default" import process.
(See Lib/pkgutil.py) |
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