I suspected it was to be used for comic book archives when I saw it on comp.lang.python.Originally Posted by mmcmonster
Comix also includes a comic book thumbnailer (in later versions) called comicthumb, written by Christoph Wolk who is a regular on these forums I believe. It is in essence very much like the one you have written, but it supports RAR and tar archives as well and has some other nice features. You can check it out if you want.
Lazy link: http://comix.sourceforge.net/