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from pyx import *
circ1 = path.circle(0, 0, 1).normpath() # you don't really need normpath,
circ2 = path.circle(1, 1, 1).normpath() # but its better to have it once
# for those operations
(circ1a, circ1b), (circ2a, circ2b) = circ1.intersect(circ2)
intersection = (circ2.split([circ2b, circ2a])[1]
<< circ1.split([circ1a, circ1b])[1])
intersection[-1].close()
union = (circ1.split([circ1a, circ1b])[0]
<< circ2.split([circ2b, circ2a])[0])
union[-1].close()
c = canvas.canvas()
c.fill(union, [color.rgb.blue])
c.fill(intersection, [color.rgb.red])
c.stroke(circ1)
c.stroke(circ2)
c.writeEPSfile("circles")
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