根据第二个参数对元组进行排序 [英] Sort tuples based on second parameter

问题描述

我有一个看起来像这样的元组列表:

I have a list of tuples that look something like this:

("Person 1",10)
("Person 2",8)
("Person 3",12)
("Person 4",20)

我要生成的是按元组的第二个值按升序排序的列表.因此，排序后L [0]应该为("Person 2", 8).

What I want produced, is the list sorted in ascending order, by the second value of the tuple. So L[0] should be ("Person 2", 8) after sorting.

我该怎么做?使用Python 3.2.2如果有帮助.

How can I do this? Using Python 3.2.2 If that helps.

推荐答案

您可以将key参数用于list.sort():

my_list.sort(key=lambda x: x[1])

或者更快一点

my_list.sort(key=operator.itemgetter(1))

(与任何模块一样，您需要import operator才能使用它.)

(As with any module, you'll need to import operator to be able to use it.)

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