["python","image","python-imaging-library","thumbnails"]
How do I resize an image using PIL and maintain its aspect ratio?

Is there an obvious way to do this that I'm missing? I'm just trying to make thumbnails.
Define a maximum size. Then, compute a resize ratio by taking min(maxwidth/width, maxheight/height). The proper size is oldsize*ratio. There is of course also a library method to do this: the method Image.thumbnail. Below is an (edited) example from the PIL documentation. import os, sys import Image size = 128, 128 for infile in sys.argv[1:]: outfile = os.path.splitext(infile)[0] + ".thumbnail" if infile != outfile: try: im = Image.open(infile) im.thumbnail(size, Image.Resampling.LANCZOS) im.save(outfile, "JPEG") except IOError: print "cannot create thumbnail for '%s'" % infile