> Of course, if somebody wants to provide a crypt importer (which
> decrypts the source before importing it) in addition to the
> pybz2importer, then you get the same coordination problem as with all
> prior import hooks.
Does anybody really believe that this problem can be solved in general?
I like the following:
1. only strings representing directories are allowed in sys.path
(a zip archive is conceptually a directory)
2. there are two types of hook that can be installed:
- an import hook that returns a module object, a stream object
or None
- a stream hook that has the opportunity to return a different
stream if it likes
When the import hook returns a stream, every stream hook is given a
chance to transform that stream. If a stream hook returns a transformed
stream then every other hook is called again. This continues until no
stream hook is interested in transforming the stream anymore.
I know that this might have performance issues, but it seems like it
would allow you to have compressed archives of encrypted modules located
on a web server without any of the hooks knowing anything about each
other.
Cheers,
Brian
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