[Image-SIG] how to use pil for a jpeg 90 compression?

[Karsten Hiddemann]

Fredrik Lundh schrieb:
> zhang chi wrote:
> 
>> I have 30 picture, and I wanna use PIL to compress them to jpeg 90. Is 
>> there a function that can do that in PIL?
> 
> What does "30" and "90" refer to?

I'd think that he refers to the "Quality" or "Compression Level" as most 
image manipulation programs call it.