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