Re: [Tutor] list packing
kevin parks wrote:
> John,
>
> Thanks... i am liking this variation a tad more since it means i only
> have to type the path in one place but it is akin to your second
> one... i was (still am really) having a hard time understanding
> how to apply path.join _and_ listdir sometimes list comprehensions
> twist my brain but this one is worth studying ...
>
> nice! two little lines that do a boatload of work! hee hee
>
>
> pth = '/Users/kpp9c/snd/01'
> samples = [os.path.join(pth, f) for f in os.listdir(pth) if f.endswith
> ('.aif')]
>
>
> i could even add:
> samples = [os.path.join(pth, f) for f in os.listdir(pth) if f.endswith
> ('.aif' & f.startswith('t')]
You might like Jason Orendorff's path module. Using it you can write
import path
pth = path.path('/Users/kpp9c/snd/01')
samples = list(pth.walkfiles('t*.aif'))
path.walkfiles() returns an iterator, that is why the list() call is
needed. If you are going to loop over the samples you can omit it:
for sample in pth.walkfiles('t*.aif'):
...
http://www.jorendorff.com/articles/python/path/index.html
Kent
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Re: [Tutor] list packing
Sean Perry wrote: > os.path.join() is self-documenting. I find this to be a better reason to > use it than anything else. But then my code only ever runs on Unix of > some flavor. I'm not sure why you put in the comment about Unix - os.path.join() is the recommended way of joining paths portably - it will do the right thing on any supported platform. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] list packing
John,
Thanks... i am liking this variation a tad more since it means i only
have to type the path in one place but it is akin to your second
one... i was (still am really) having a hard time understanding
how to apply path.join _and_ listdir sometimes list comprehensions
twist my brain but this one is worth studying ...
nice! two little lines that do a boatload of work! hee hee
pth = '/Users/kpp9c/snd/01'
samples = [os.path.join(pth, f) for f in os.listdir(pth) if f.endswith
('.aif')]
i could even add:
samples = [os.path.join(pth, f) for f in os.listdir(pth) if f.endswith
('.aif' & f.startswith('t')]
to make sublists in guess
What i like about this is that i can chance my directory structure
(add/delete/rename/etc)
and shape it any way that i want and then Python reflects all my
restructuring... lovely...
Exactly the type of tedious thing i want Python to do for me *^-^*
cheers,
kevin
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Re: [Tutor] list packing
John Fouhy wrote:
> On 27/02/06, kevin parks <[EMAIL PROTECTED]> wrote:
>
>>snd = [f for f in os.listdir('/Users/kevin/snd/') if f.endswith('.aif')]
>
>
> If this is all you need, then you could do something like:
>
> snd = ['/Users/kevin/snd/%s' % f for f in
> os.listdir('/Users/kevin/snd/') if f.endswith('.aif')]
>
> Or, slightly more robustly (?),
>
> snd = [os.path.join('/Users/kevin/snd', f) for f in
> os.listdir('/Users/kevin/snd/') if f.endswith('.aif')]
>
os.path.join() is self-documenting. I find this to be a better reason to
use it than anything else. But then my code only ever runs on Unix of
some flavor.
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Re: [Tutor] list packing
On 27/02/06, kevin parks <[EMAIL PROTECTED]> wrote:
> snd = [f for f in os.listdir('/Users/kevin/snd/') if f.endswith('.aif')]
If this is all you need, then you could do something like:
snd = ['/Users/kevin/snd/%s' % f for f in
os.listdir('/Users/kevin/snd/') if f.endswith('.aif')]
Or, slightly more robustly (?),
snd = [os.path.join('/Users/kevin/snd', f) for f in
os.listdir('/Users/kevin/snd/') if f.endswith('.aif')]
--
John.
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