def triangles(): L=[1] while True: yield L L1 = [0] + L L2 = L + [0] L = [L1[i]+L2[i] for i in range(len(L1))]
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达仔hongda
def triangles(): L=[1] while True: yield L L1 = [0] + L L2 = L + [0] L = [L1[i]+L2[i] for i in range(len(L1))]