Python程序-打印单词的菱形字符图案

源程序如下：

a = [1, 2, 3, 4, 5, 6, 7, 6, 5, 4, 3, 2, 1]
b = [' ' * 2 * (7 - i) + 'Good' * i for i in a]
for line in b:
    print(line)

程序运行结果如下：

            Good
          GoodGood
        GoodGoodGood
      GoodGoodGoodGood
    GoodGoodGoodGoodGood
  GoodGoodGoodGoodGoodGood
GoodGoodGoodGoodGoodGoodGood
  GoodGoodGoodGoodGoodGood
    GoodGoodGoodGoodGood
      GoodGoodGoodGood
        GoodGoodGood
          GoodGood
            Good