Modifying JPEG compression with PIL?

[Dinu C. Gherman]

Sorry, but I always fail to find appropriate PIL documenta-
tion, so forgive me when I ask if using PIL I can take a JPEG 
and increase its compression, so it will shrink in file size
(and lose data as well)? If so, where can I read how to do 
it?

Thanks,

Dinu

-- 
Dinu C. Gherman
................................................................
"The only possible values [for quality] are 'excellent' and 'in-
sanely excellent', depending on whether lives are at stake or 
not. Otherwise you don't enjoy your work, you don't work well, 
and the project goes down the drain." 
                    (Kent Beck, "Extreme Programming Explained")