def triangles(m): L = [1] n = 0 while n < m: yield L L=[L[0]]+[L[i]+L[i+1] for i in range(len(L)-1)]+[L[0]] n = n + 1
for x in triangles(10): print(x)
[1] [1, 1] [1, 2, 1] [1, 3, 3, 1] [1, 4, 6, 4, 1] [1, 5, 10, 10, 5, 1] [1, 6, 15, 20, 15, 6, 1] [1, 7, 21, 35, 35, 21, 7, 1] [1, 8, 28, 56, 70, 56, 28, 8, 1] [1, 9, 36, 84, 126, 126, 84, 36, 9, 1]
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骑着单车去追梦20160428
def triangles(m): L = [1] n = 0 while n < m: yield L L=[L[0]]+[L[i]+L[i+1] for i in range(len(L)-1)]+[L[0]] n = n + 1
for x in triangles(10): print(x)
[1] [1, 1] [1, 2, 1] [1, 3, 3, 1] [1, 4, 6, 4, 1] [1, 5, 10, 10, 5, 1] [1, 6, 15, 20, 15, 6, 1] [1, 7, 21, 35, 35, 21, 7, 1] [1, 8, 28, 56, 70, 56, 28, 8, 1] [1, 9, 36, 84, 126, 126, 84, 36, 9, 1]