Question

I have made an online gallery using Python and Django. I’ve just started to add editing functionality, starting with a rotation. I use sorl.thumbnail to auto-generate thumbnails on demand.

When I edit the original file, I need to clean up all the thumbnails so new ones are generated. There are three or four of them per image (I have different ones for different occasions).

I could hard-code in the file-varients… But that’s messy and if I change the way I do things, I’ll need to revisit the code.

Ideally I’d like to do a regex-delete. In regex terms, all my originals are named like so:

^(?P<photo_id>\d+)\.jpg$

So I want to delete:

^(?P<photo_id>\d+)[^\d].*jpg$

(Where I replace photo_id with the ID I want to clean.)

Answer 1

Try something like this:

import os, re

def purge(dir, pattern):
    for f in os.listdir(dir):
        if re.search(pattern, f):
            os.remove(os.path.join(dir, f))

Then you would pass the directory containing the files and the pattern you wish to match.