[Tutor] Querying a packages modules?

[Eric Pavey]

On Fri, Nov 20, 2009 at 10:40 AM, Dave Angel <davea at ieee.org> wrote:

> Eric Pavey wrote:
>
>> On Fri, Nov 20, 2009 at 4:09 AM, Kent Johnson <kent37 at tds.net> wrote:
>>
>>
>>
>>> On Thu, Nov 19, 2009 at 9:31 PM, Eric Pavey <warpcat at gmail.com> wrote:
>>>
>>>
>>>> Say I have this package layout
>>>>
>>>> \myPackage
>>>>
>>>> __init__.py
>>>> moduleA.py
>>>> moduleB.py
>>>>
>>>> Is there a way (and I'm sure there is...) to query, for a given package
>>>> level, which modules live under it?
>>>> I thought I could do it like so:
>>>>
>>>> import myPackage
>>>> goodQualityInfo = dir(myPackage)
>>>>
>>>>
>>> One way to do this is to include an __all__ attribute in __init__.p]:
>>> __all__ = ['moduleA', 'moduleB']
>>>
>>> Then instead of dir(myPackage) use myPackage.__all__.
>>>
>>> The name is standard though it is usually used for a slightly different
>>> purpose:
>>> http://docs.python.org/tutorial/modules.html#importing-from-a-package
>>>
>>> Kent
>>>
>>
>> Thanks.  I was considering that too, but I want to be able to have people
>> drop modules in that dir and "be done with it":  Not also have them also
>> need to update __all__ in __init__.py
>> Appreciate the suggestion though.
>> My current hacky plan is just query the location on disk of the imported
>> package, then do a dir search for .py files in that dir, and process
>> those.
>> Seems clunky though.
>>
>>  Doesn't seem clunky to me.  And if you do it in __init__.py, you can use
> the __file__ attribute to get your base directory.  Just put the results in
> __all__ and you combine both ideas.
>
> DaveA
>

Starting to like that more ;)
thanks
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