Path / Listing and os.walk problem.

Alban Nona python.koda at gmail.com
Thu Aug 26 16:35:27 CEST 2010


Hey ! Thank you guys !
It help me a lot !

@Dennis (Gomes): Thanks ! I tried it it worked well but list me the whole
files :P (and finally crashed python...lol)

I looked at the Peter method and, Im really dumb to didnt tough about
defining a pattern like *_v001.0001.exr * like this, it sort me only one
frame...which is perfect and less memory consuming I guess.

And glob use seems to be perfect for what I want to do ! so thank you to
point me in this direction :p

I tried also the Peter code, and it give me a good listing of my element
like I wanted:

HPO7_SEQ004_031_VDMRoom_ALB
HPO7_SEQ004_031_VDMRoom_AMB
HPO7_SEQ004_031_VDMRoom_BTY
HPO7_SEQ004_031_VDMRoom_Cutouts_ALB
HPO7_SEQ004_031_VDMRoom_Cutouts_AMB
HPO7_SEQ004_031_VDMRoom_Cutouts_DET
....
HPO7_SEQ004_031_VDMRoom_DET
HPO7_SEQ004_031_VDMRoom_DIF
HPO7_SEQ004_031_VDMRoom_DPF
HPO7_SEQ004_031_VDMRoom_Decals_ALB
....
HPO7_SEQ004_031_VDM_ALB
HPO7_SEQ004_031_VDM_AMB
HPO7_SEQ004_031_VDM_BTY
HPO7_SEQ004_031_VDM_DIF
HPO7_SEQ004_031_VDM_DPF
HPO7_SEQ004_031_VDM_Fresnel_mat


Unfortunatly, a new problem come to me, I looking to get that kind of  list:

HPO7_SEQ004_031_VDMRoom
HPO7_SEQ004_031_VDMRoom
HPO7_SEQ004_031_VDMRoom
HPO7_SEQ004_031_VDMRoom_Cutouts
HPO7_SEQ004_031_VDMRoom_Cutouts
HPO7_SEQ004_031_VDMRoom_Cutouts
....

Right now, Im looking the documentation to find a way to do it, Im thinking
about string methods, I also though: " hey, I just have to delete the 4 last
characters, but na ! itll not work because sometime I have something like
"_Fresnel_mat'' which is of course more than 4 chars...)

Maybe the best would be to declare something like "in the string, look at
the last "_" and delete it + whatever there is after"
but I didnt find how to do it, I mean I tried splitext which is, not
appropriate.

Do I have to declare a list of element like:
elementList: ["_ALB", "AMB", "_Beauty", etc...]
and to search that pattern in the files name to remove it after ? it seems
not bad as solution, but I pretty sure there is a better way to do it.

right ?

anyway, thank very much guys ! :)
and have a good day !


2010/8/26 Peter Otten <__peter__ at web.de>

> Alban Nona wrote:
>
> > Hi
> >
> > So here is my problem:
> >
> > I have my render files that are into a directory like this:
> >
> > c:\log\renderfiles\HPO7_SEQ004_031_VDM_DIF_V001.0001.exr
> > c:\log\renderfiles\HPO7_SEQ004_031_VDM_DIF_V001.0002.exr
> > c:\log\renderfiles\HPO7_SEQ004_031_VDM_DIF_V001.0003.exr
> > ....
> > c:\log\renderfiles\HPO7_SEQ004_031_VDM_AMB_V001.0001.exr
> > c:\log\renderfiles\HPO7_SEQ004_031_VDM_AMB_V001.0002.exr
> > c:\log\renderfiles\HPO7_SEQ004_031_VDM_AMB_V001.0003.exr
> >
> > True is, there is like 1000 Files is the directory (C:\log\renderfiles\)
> >
> > What Iam looking to is to extract the first part of the filenames as a
> > list, but I dont want the script to extract it 1000times, I mean I dont
> > need it to extract HPO7_SEQ004_031_VDM_AMB 150 times, because there is
> 150
> > Frames. (not sure if its clear tought)
> >
> > so far, I would like the list to look lik:
> >
> > ["HPO7_SEQ004_031_VDM_DIF", "HPO7_SEQ004_031_VDM_AMB", etc...]
> >
> >
> > I start to think about that, to try to use a
> >
> > for (path, dirs, files) in os.walk(path):
> >     list.append(files)
> >
> >
> > but this kind of thing will just append the whole 1000 files, thing that
> I
> > dont want, and more complicated I dont want the thing after "AMB" or
> "DIF"
> > in the name files to follow.
> > (thing I can delete using a split, if I read well ?)
> >
> >
> > I trying to search on internet for answer, but seems I find nothing about
> > it.
> > Someone can help me with that please, show me the way or something ?
>
> You can use glob. Assuming the files are all in one directory:
>
> import os
> import glob
>
> folder = r"C:\log\renderfiles"
>
> # find files that end with "_V001.0001.exr"
> pattern = os.path.join(folder, "*_V001.0001.exr")
> files = glob.glob(pattern)
>
> # remove the directory
> names = [os.path.basename(f) for f in files]
>
> # remove everything after and including the last occurence of "_"
> names = [n.rpartition("_")[0] for n in names]
>
> print "\n".join(sorted(names))
>
> Peter
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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