[pygame] circular setion on an array

[jabberwocky <azazel_arms@yahoo.it>]

If I have an array with all zeros, there is a way to
change to 1 some positions in order to get a full
circle drawned by the 1s? or better, having all 1s in
the array change to 0 the positions out of the
"circle", in other words I need a way to select
elliptical section onto an array...

thank you

ps:
Is there maybe an idea to switch to numarray from
numeric? 

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