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http://issues.apache.org/jira/browse/MODPYTHON-154?page=comments#action_12376138
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Graham Dumpleton commented on MODPYTHON-154:
--------------------------------------------

What I have decided to do here is by default not allow the new importer to look 
back in the handler root directory where import is done from another directory. 
This is in the interests of making rules simpler and more predictable. In case 
for some reason code is dependent on this behaviour, will provide a 
PythonOption "mod_python.importer.mimic_old_rules" which can be set to enable 
the old type of lookup rules. The purpose of this would only be to allow such 
code to run until it can be modified to work with the new module lookup rules.


> PythonPath overriding use of Python*Handler directory.
> ------------------------------------------------------
>
>          Key: MODPYTHON-154
>          URL: http://issues.apache.org/jira/browse/MODPYTHON-154
>      Project: mod_python
>         Type: Sub-task

>   Components: importer
>     Reporter: Graham Dumpleton
>     Assignee: Graham Dumpleton

>
> The behaviour of the old importer is such that if the PythonPath directive 
> has been used in the same or parent configuration context, then any physical 
> directory corresponding to where the Python*Handler directive was used, is 
> not added to sys.path.
> The new importer currently preserves the above behaviour, but since the new 
> importer does not actually add the directory associated with the 
> Python*Handler directive into sys.path, it doesn't seem to make any sense 
> that setting PythonPath should cause the directory the Python*Handler 
> directive is associated with to be ignored.
> Thus propose that PythonPath should be kept quite distinct from directories 
> in document tree for which Python*Handler is specified for and setting 
> PythonPath will would no longer cause directory Python*Handler directive is 
> specified for to be ignored.
> Overall, this should actually eliminate unexpected behaviour whereby user 
> sets PythonPath and then finds their modules in document tree can't be found. 
> The only solution to this with the old importer is to add the directories in 
> the document tree explicitly to PythonPath directive.
> If there is some valid reason that the new importer should never look in the 
> document tree for modules, then it would be better handled by some sort of 
> PythonOption rather than it be a side effect of having used the PythonPath 
> directive.

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