Re: [Sndobj-devel] PySndObj, Python 2.4, Mac OS10.4

[sonify <so...@av...>]

The /Library problem arises partly because the python community (I  
think on Apple's general advice)
recommends against tampering with the distributed version. They keep  
it as their own 'space'
I think this will change in the future and the python community is  
working on it (them!) to keep the system
python up-to-date..

  I actually run 3 different versions of python for different  
projects: 2.3 , 2.4,  and 2.5
2.3 is the apple-distributed one
/Library/Frameworks/Python.framework/Versions/Current is a symbolic  
link (ln -s) to a directory, like
/Library/Frameworks/Python.framework/Versions//2.4/ which is the top  
directory for python2.4

so to use Python2.5, I install the library at
/Library/Frameworks/Python.framework/Versions//2.5/
and then alter the "Current" symbolic link.
So whatever python is appropriate for a particular project, as long  
as scons looks at
/Library/Frameworks/Python.framework/Versions/Current/
it seems to work OK.

- David

On 25/01/2007, at 8:42 PM, Victor Lazzarini wrote:

> I realised that 2.4 ends up in /Library.... and actually added a fix
> to SConstruct yesterday. Now you should not need to add the path,
> it will find it for you. The confusing thing is that having both  
> 2.4 and
> 2.3 in the same machine might eventually lead to problems. It's
> something really messy that OSX has not solved yet.
>
> I hope that with the SConstruct changes things are a little less
> messy.
>
> But you're right, we are still not at an self-configurable easy-to- 
> build stage
>   yet. But I am confident we are better than we were when using  
> 'make' and will
> get there eventually.
>
> Victor
>
> At 06:07 25/01/2007, Craig Lewiston wrote:
>> I *finally* was able to get sndobj.py successfully generated and
>> installed on OSX (10.4.8), with Python 2.4.4
>>
>> my initial problem was that I was continually getting this error when
>> I would try to 'import sndobj' from the python interpreter:
>>
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in ?
>>  File
>> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ 
>> site-packages/sndobj.py",
>> line 4, in ?
>>    import _sndobj
>> ImportError: Failure linking new module:
>> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ 
>> site-packages/_sndobj.so:
>> Library not loaded: lib/libsndobj.dylib
>>  Referenced from:
>> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ 
>> site-packages/_sndobj.so
>>  Reason: image not found
>>
>>
>> the default Python that comes with OSX, on my machine, was Python
>> 2.3.5.  however, i was running Python 2.4.4 from a different  
>> location.
>>  i needed this because of other  modules i am using with my
>> application.  it turned out, that in the SConstruct file, the  
>> variable
>> pythonpath needed to be changed from:
>>
>> pythonpath = '/System/Library/Frameworks/Python.framework'
>> (the location of the original Python 2.3.5 install), to:
>>
>> pythonpath = '/Library/Frameworks/Python.framework'
>> (the location of Python 2.4.4.)
>>
>> however, once i did this, i was still having problems when i'd run
>> scons.  the build would complete, but no sndobj.py file could be
>> found.  so, after reading a little bit, i ran scons again with the
>> cache disabled:
>>
>> %scons --cache-disable
>> (scons user guide here: http://www.scons.org/doc/HTML/scons- 
>> user.html)
>>
>> when i did that, it completely rebuilt SndObj, including generating
>> the sndobj.py file, along with its libraries.
>>
>> still, the problem was that the PySndObj files (sndobj.py,  
>> _sndobj.so,
>> libsndobj.dylib) were not being installed into my Python 2.4.4
>> framework automatically with the scons build.  instead, they were  
>> just
>> showing up in the install folder on my desktop, so i had to manually
>> install them into my Python framework.  from the SConstruct file, as
>> far as i can tell, it doesn't look like it's built to install the
>> PySndObj files.  is this correct?
>>
>> either way, it's working now.
>>
>> another issue i notice: in the SConstruct file, in the general
>> configuration section, the indenting seemed to be very complicated.
>> is there a reason for this?  i know that indenting is crucial to
>> proper python execution, and the mixed spaces and tabs in that  
>> section
>> really confused.  one of the reason i bring this up is because even
>> though i had set pythonpath in the code, when i ran:
>>
>> %scons -h
>>
>> i got a printout with an 'actual' value of pythonpath to be blank.
>> so, i had to manually set python by running
>>
>> %scons pythonpath=/Library/Frameworks/Python.framework
>>
>> of course, i was running scons so many times that maybe this is some
>> error on my part.  either way, i wanted to see if anyone else had
>> notice the indenting in that section, and could possibly explain it.
>>
>> all that said, i'm curious to know what other people on this list are
>> using SndObj for in their Python applications.  my current  
>> application
>> is a Tkinter-based GUI that takes incoming signals from a USB
>> prototype keyboard and turns those into sound.  it's basically a MIDI
>> controller, without the MIDI.
>>
>> ok.  thanks for getting back to me.
>>
>> -craig
>>
>>
>> On 1/23/07, akonsu <ak...@gm...> wrote:
>>> Hello,
>>>
>>> you can build it from source for your version. it looks like you are
>>> on osx, so it should work. it worked for me on openbsd, osx is even
>>> easier.
>>>
>>> konstantin
>>>
>>> 2007/1/23, sonify <so...@av...>:
>>>> Hi Craig,
>>>> What architecture/ operating system?
>>>>
>>>>
>>>> On 23/01/2007, at 10:39 AM, Craig Lewiston wrote:
>>>>
>>>>> I've been having trouble getting SndObj to work in Python,  
>>>>> before I
>>>>> finally realized that the current release is only built for Python
>>>>> 2.3.  I changed my PATH to point to the Apple's default Python  
>>>>> install
>>>>> (2.3.5), and SndObj worked great within Python.  The problem  
>>>>> is, my
>>>>> current application that I'm trying to add sound to uses other
>>>>> external modules that are only compatible with at least Python  
>>>>> 2.4.
>>>>>
>>>>> Is there a way I can build SndObj for Python 2.4?  Do you only  
>>>>> have to
>>>>> alter _sndobj.so to link to Python 2.4 on the system, or is there
>>>>> something more fundamental that needs to be done?
>>>>>
>>>>> thanks,
>>>>> craig
>>>>>
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>
> Victor Lazzarini
> Music Technology Laboratory
> Music Department
> National University of Ireland, Maynooth
>
>
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