regular expression concatenation with strings

[oscartheduck]

Got it:

#!/usr/bin/env python
from PIL import Image
import glob, os, re

size = 128, 128

def thumbnailer(dir, filenameRx):
     for picture in [ p for p in os.listdir(dir) if
os.path.isfile(os.path.join(
dir,p)) and filenameRx.match(p) ]:
         file, ext = os.path.splitext(picture)
         im = Image.open (picture)
         im.thumbnail(size, Image.ANTIALIAS)
         im.save(file + ".thumbnail" + ext)

jpg = re.compile(".*\.(jpg|jpeg)", re.IGNORECASE)
thumbnailer(".", jpg)



The answer was sitting in front of my eyes. What is your code doing?
It looks like:

for $foo in [current working directory]
if $foo is a file
and foo's name matches the regex