杨辉三角import numpy as npn = int(input('请输入一个整数：'))z = np.zeros((n,n), dtype = 'i')z[0][0] = 1for i in range(1, n): z[i][0] = 1 z[i][i] = 1 for j in range(1, i): z[i][j] = z[i-1][j-1] + z[i-1][j]for i in range(n): for j in range(i+1): print('{:4s}'.format(str(z[i][j])), end = '') print()