[Image-SIG] PIL and simple conversion

[Gregory Tappero]

Hi everyone,

I have a png in P mode with black writting on white background
I want a transparent png with black writting in white

So far i did this

    im = Image.open("foo.png")
    im = im.convert("RGB")
    im = ImageOps.invert(im)
    im = im.convert("P")
    im.save("new2.png", transparency=0)

it works well, except that i dont want to save the image i want the
data to return it
to my web client.

So what is a equivalent of im.save("new2.png", transparency=0) which
does not save the image ?
Thanks

Greg

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o/