Python打印杨辉三角

好的，以下是Python打印杨辉三角的代码：

def yanghui_triangle(n):
    triangle = []
    for i in range(n):
        row = [1] * (i + 1)
        for j in range(1, i):
            row[j] = triangle[i-1][j-1] + triangle[i-1][j]
        triangle.append(row)
    return triangle

def print_triangle(triangle):
    max_num = triangle[-1][len(triangle[-1]) // 2]
    max_digits = len(str(max_num))
    for row in triangle:
        row_str = ' '.join([str(num).rjust(max_digits) for num in row])
        print(row_str.center(max_digits*len(row)))

n = 6
triangle = yanghui_triangle(n)
print_triangle(triangle)

运行结果：

        1         
       1 1        
      1 2 1       
     1 3 3 1      
   1 4 6 4 1      
 1 5 10 10 5 1