如何根据相关值获取最大项目? [英] How to get the max item based on a dependent value?

问题描述

我有这个数组:

array = ["a\nb", "c", "d"]

我想找出哪个数组的元素有更多行以及多少行.我想要python中的ruby代码:

I want to find out which array's element has more lines and how many. I want this ruby code in python:

array.map {|e| e.split("\n").size }.max #=> 2

这可行，但是我想知道是否有更好的方法:

This works, but I want to know if there's a better way:

bigger = 0
for e in array:
    e_lines = len(e.split('\n'))
    if e_lines > bigger:
        bigger = e_lines

推荐答案

In [54]: array = ["a\nb", "c", "d"]
In [56]: max(e.count("\n") for e in array)+1
Out[56]: 2

如果您还希望具有最大行数的(可能是非唯一的)元素:

If you also want a (possibly non-unique) element with the maximum number of lines:

In [60]: max((e.count("\n")+1, e) for e in array)
Out[60]: (2, 'a\nb')

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