[Tutor] batch file processing w/ python using cmd line executable?
alan.gauld at btinternet.com
Fri Feb 12 21:00:42 CET 2010
"kevin parks" <kp8 at mac.com> wrote
> I wonder if it is possible to use python to call sox and have it do
> os.mkdir, process all the input files in a particular directory and
> put the converted files into the directory it made with mkdir...
Of course. What do you perceive to be the problem?
This would just be a standard loop or os.walk call.
> The script would call sox repeatedly and create a new dir with a
> converted file for each found in the original folder. like so:
Presumably a new dir for each dir found?
Thus mirroring the source structure? Thats easily done with
os.walk and would be a good place to start writing the script.
Calling sox can be done using the subprocess module.
> what makes this especially hairy is that sox is a monster an typically
> needs a crazy number of arguments, though these would be the same for
> the whole batch.
So store them in a list and apply them to each call.
subprocess makes this easy.
> % sox -V3 -D -S St.01.aif -b16 kp/flute/STout/St.01.wav rate -s -v
> Is there away to do this in python, by just pointing it to a whole dir
> of files and say "do it" to all of these?
I'd check out os.walk and subprocess.
Both are discussed in the Using the OS topic in my tutorial.
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