On 08/06/2012 11:11 AM, Emile van Sebille wrote: <snip> > > for i in range(N,N+100): > for j in range(M,M+100): > do_something(i % 100 ,j % 100) > > Emile How about... for i in range(100): for j in range(100): do_something((i + N) % 100, (j + M) % 100) -=- Larry -=-