help with this loop

[Thekid]

I need help writing a loop for this.

image = ImageGrab.grab((0,0,800,800))
box = (100,100,400,400)
im = image.crop(box)
im1 = im.save("screen.jpg")
# at this point I need to rotate the image 90 degrees and crop it again, but do this four times-
# so I'd like a loop here instead of this:
im2 = im1.rotate(90)
im3 = im2.crop(box)
im4 = im3.save("screen1.jpg")
im5 = im4.rotate(90)
im6 = im5.crop(box)
im7 = im6.save("screen2.jpg")
im8=im7.rotate(90)
im9=im8.crop(box)
im10=im9.save("screen3.jpg")
# I did try something like this:
# for i in range(3):
#       im,im1,im2
#but that doesn't work
 

any help?

[bvdet]

If you don't need to save any intermediate results, maybe something like this:

for i in range(1, 4):
    im1.rotate(90).crop(box).save("screen%s.jpg" % i)

[bvdet]

I thought about it some more, and the code I suggested will only work if the methods modify the image object "in place". I am not so sure whether or not the save method returns an image object, but it probably does not modify the object. Here's the loop again, slightly modified:

for i in range(1, 4):
    im1 = im1.rotate(90).crop(box)
    im1.save("screen%s.jpg" % i)

[Thekid]

This looks good but when I try it the image will only rotate one time and then the jpg is saved 3 times.