On 7/16/12 1:43 PM, The Doctor (Michael) wrote:
l1=[(3*cos(phi),3*sin(phi)) for phi in srange(3*n(pi)/2,n(pi)/2,0.01)]
l2=[(6*cos(phi),6*sin(phi)) for phi in srange(3*n(pi)/2,n(pi)/2,0.01)]
l2.reverse()

If I do

print l1+l2

here, I see your list is empty.  Perhaps your sranges are empty?

Jason



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