根据条件过滤元组列表 [英] Filter a list of tuples based on condition

问题描述

我有一个这样的列表:

A=[(1,'A'),(2,'H'),(3,'K'),(4,'J')]

此列表的每个成员都是这样的:(数字，字符串)

Each member of this list is like this: (number, string)

现在，如果我要选择大于2的成员并编写字符串，该怎么办?

Now if I want to select the members if the number is bigger than 2 and write the string, what should I do?

例如: 选择数字大于2的成员，输出应为:'K','J'

For example: selecting the member with a number bigger than 2. the output should be: 'K','J'

推荐答案

使用列表理解:

[y for x,y in A if x>2]

演示:

>>> A=[(1,'A'),(2,'H'),(3,'K'),(4,'J')]
>>> [y for x,y in A if x>2]
['K', 'J']
>>> 

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