[Python-3000] Changing the import machinery

[Greg Ewing]

Phillip J. Eby wrote:

> So, what I'd suggest is that the expanded import mechanism would provide a 
> registry of extensions and handlers,

Urg, global registries again.

I'd like this better if the scope of a particular extension
and its handler could be restricted to some chosen part of
the package namespace. So the author of the 'grail' package
can specify a handler for his special '.nun' files, but it
only applies to imports within the 'grail' package, and
can't conflict with anyone else's registration of a handler
for the same extension in other places.

Perhaps the handlers pertaining to a package could be
attached to the module object for that package, in an
__importers__ attribute or something like that. Then,
when looking for a handler for a particular file, a
search is made upwards from its containing package
looking for a handler that matches it.

--
Greg