Python script to create image thumbnails while preserving Aspect ratio

create_thumb

import PIL

from os import listdir
from os.path import isfile, join
from PIL import Image

directory_path = "<some directory>"
onlyfiles = [ f for f in listdir(directory_path) if isfile(join(directory_path,f)) ]  
basewidth = 64

for fl_name in onlyfiles:
    if not fl_name or fl_name.endswith('.db'):
        continue
    img = Image.open(fl_name)
    wpercent = (basewidth/float(img.size[0]))
    hsize = int((float(img.size[1])*float(wpercent)))
    img = img.resize((basewidth,hsize), PIL.Image.ANTIALIAS)
    img.save(fl_name)