Package Organization (was Re: [Zope3-dev] Voting on Schema design)

[Guido van Rossum]

>     >> There's one technical glitch which might argue against a Zope
>     >> top-level placeholder.  If you ever want to import some
>     >> Zope.PackageA from a different directory than Zope.PackageB you
>     >> will be stuck because Python won't search two directories for a
>     >> package's contents.
> 
>     GvR> Yes it will, if the package's __init__ adds to its __path__.
> 
> Which package, and which __init__?  I'm having a hard time seeing how
> that would be manageable.

In this case, the global variable __path__ in package Zope.  There
could be code in its __init__.py that walks over sys.path and looks
for other directories named Zope and adds them all to __path__.

(This is a little-known detail of the package interface I guess.
There's some info about it in
http://www.python.org/doc/essays/packages.html.)

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