save animated GIF in Python Image Library

[christof hoeke]

hi,
how can i save an animated GIF with PIL?

e.g. to rotate all frames of an image i tried the following:

im = Image.open('anim.gif')
for f in ImageSequence(im): #using the class from the PIL handbook
     if f:
         f = f.rotate(180)
im.save('animrotated.gif')

problem is that only one frame (i guess the last one) is saved.
i could not find any options for saving GIFs in the handbook.

can this be done at all?

thanks
christof