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

[Barry A. Warsaw]

>>>>> "GvR" == Guido van Rossum <guido@python.org> writes:

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

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

Interesting.  So Zope/__init__.py should contain something like:

-------------------- snip snip --------------------
import os
import sys

for dir in sys.path:
    fullpath = os.path.join(dir, 'Zope')
    initfile = os.path.join(fullpath, '__init__.py')
    if os.path.exists(initfile):
        # Should the other package be searched first or later?
        __path__.append(fullpath)
-------------------- snip snip --------------------

One problem is the inability to answer the question in the comment,
since either answer may be correct depending on the circumstances.

-Barry