[Python-Dev] PEP 420 - dynamic path computation is missing rationale

[Nick Coghlan]

On Wed, May 23, 2012 at 1:39 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:
>     def _recalculate(self):
>         # If _parent_path has changed, recalculate _path
>         parent_path = tuple(self._parent_path())     # Retrieve and make a copy
>         if parent_path != self._last_parent_path:
>             loader, new_path = self._path_finder(self._name, parent_path)
>             # Note that no changes are made if a loader is returned, but we
>             #  do remember the new parent path
>             if loader is None:
>                 self._path = new_path
>             self._last_parent_path = parent_path   # Save the copy
>         return self._path

Oops, I also meant to say that it's probably worth at least issuing
ImportWarning if a new portion with an __init__.py gets added - it's
going to block all future dynamic updates of that namespace package.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia