Does anyone know of any python imaging modules that can change the
delay between frames of an animated GIF?
No. Python imaging libs are pretty biased against GIFs because
of the patent problems (mostly over now?).
I personally would recommend using system calls to control
*gifsicle*, which is the smartest free tool I know for dealing
with GIFs. It can do essentially anything the GIF format supports,
which is a lot more than you can do with PIL or ImageMagick or
other tools.
Anyway, this is what I use when it comes up. There is still some
noise about the patent issue, and this is why Debian still calls
gifsicle "non-free", but the program itself is GPL free-licensed.
If you're going to use GIFs, this is as free as you can get.
Cheers,
Terry