Python - 杨辉三角

def triangles():L = [1]while True:yield LL = [sum(i) for i in zip([0] + L, L + [0])]# Output of## n = 0# for t in triangles():#print(t)#n = n + 1#if n == 10:#break## is:## [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]