Python 我们如何获取特定索引列表中的元素？

我有一个python列表

a= ['Sample Date', '4/21/2015', '10/14/2014', '9/16/2014', '7/10/2014', '8/11/2014', '8/3/2014', '7/20/2014', '7/6/2014', '8/11/2014', '8/11/2014', '8/11/2014'] 

我有一个索引列表，属于一个列表

b=[5, 9, 10, 11].

要获得以下输出，代码应该是什么

c= ['7/20/2014', '7/6/2014','7/20/2014', '7/6/2014']

---

使用简单的列表理解

>>> a= ['Sample Date', '4/21/2015', '10/14/2014', '9/16/2014', '7/10/2014', '8/11/2014', '8/3/2014', '7/20/2014', '7/6/2014', '8/11/2014', '8/11/2014', '8/11/2014'] 
>>> b=[5, 9, 10, 11]
>>> [a[i-1] for i in b]
['7/10/2014', '7/6/2014', '8/11/2014', '8/11/2014']

或

如果它基于

0

th索引

确实如此

>>> from operator import itemgetter
>>> a = ['Sample Date', '4/21/2015', '10/14/2014', '9/16/2014', '7/10/2014', '8/11/2014', '8/3/2014', '7/20/2014', '7/6/2014', '8/11/2014', '8/11/2014', '8/11/2014'] 
>>> getitems = itemgetter(5, 9, 10, 11)
>>> getitems(a)
('8/11/2014', '8/11/2014', '8/11/2014', '8/11/2014')

---

b

中的索引如何与

a

相关，从而使

c

。我的意思是

a

中的第5个索引不是'7/20/2014'而是'8/11/2014'。你能展示一下itemgetter的代码是什么样子吗？这在Python 2中有效吗？我得到：name错误：name'itemgetter'未定义抱歉，忘记包含导入行。现在添加。

>>> from operator import itemgetter
>>> a = ['Sample Date', '4/21/2015', '10/14/2014', '9/16/2014', '7/10/2014', '8/11/2014', '8/3/2014', '7/20/2014', '7/6/2014', '8/11/2014', '8/11/2014', '8/11/2014'] 
>>> getitems = itemgetter(5, 9, 10, 11)
>>> getitems(a)
('8/11/2014', '8/11/2014', '8/11/2014', '8/11/2014')