n = int(input("请输入一个不大于10的正整数n："))

初始化杨辉三角

yanghui = [[1] * (i + 1) for i in range(n)]

生成杨辉三角

for i in range(2, n): for j in range(1, i): yanghui[i][j] = yanghui[i-1][j-1] + yanghui[i-1][j]

输出杨辉三角

for i in range(n): for j in range(i+1): print(str(yanghui[i][j]).center(5), end="") print()