python九九乘法表编程右对齐

可以使用字符串格式化来实现右对齐输出九九乘法表，具体代码如下：

for i in range(1, 10):
    for j in range(1, i+1):
        print("{:2d} x{:2d} ={:2d}".format(j, i, i*j), end="  ")
    print()

其中，`{:2d}`表示输出一个整数，占两个字符位，不足两位则用空格补齐。`end=" "`表示输出完一行后不换行，而是输出两个空格，使得下一行的第一个数能够与上一行对齐。效果如下：

 1 x 1 = 1  
 1 x 2 = 2   2 x 2 = 4  
 1 x 3 = 3   2 x 3 = 6   3 x 3 = 9  
 1 x 4 = 4   2 x 4 = 8   3 x 4 =12   4 x 4 =16  
 1 x 5 = 5   2 x 5 =10   3 x 5 =15   4 x 5 =20   5 x 5 =25  
 1 x 6 = 6   2 x 6 =12   3 x 6 =18   4 x 6 =24   5 x 6 =30   6 x 6 =36  
 1 x 7 = 7   2 x 7 =14   3 x 7 =21   4 x 7 =28   5 x 7 =35   6 x 7 =42   7 x 7 =49  
 1 x 8 = 8   2 x 8 =16   3 x 8 =24   4 x 8 =32   5 x 8 =40   6 x 8 =48   7 x 8 =56   8 x 8 =64  
 1 x 9 = 9   2 x 9 =18   3 x 9 =27   4 x 9 =36   5 x 9 =45   6 x 9 =54   7 x 9 =63   8 x 9 =72   9 x 9 =81