在列表列表中搜索最多一列 [英] search the biggest number of one column in a list of list

问题描述

我有一个列表list = [(1,2,5), (2,8,7),(3,6,9)]，我想找到第三列的最大数目，所以我尝试了:

I have an list of list, list = [(1,2,5), (2,8,7),(3,6,9)], and I want to find the biggest number of the third column, so I tried:

zipped = zip(*list)
print max(zipped[2])

但是它没有显示最大的数字.有人知道原因和解决方案吗?

But it does not show the biggest number. Anyone know why and a solution?

推荐答案

适用于所有较新的Python:

Works on all newer Pythons:

>>> li = [(1,2,5), (2,8,7),(3,6,9)]
>>> max(l[2] for l in li)
9

如果您有文字:

>>> li = [('1','2','5'), ('2','8','7'),('3','6','9')]
>>> max(int(l[2]) for l in li)
9

并且即使源是迭代器/生成器也可以工作.这是在Py3.3上，其中zip返回一个迭代器:

And works even if the source is an iterator / generator. This is on Py3.3 where zip returns an iterator:

>>> gli=(e for e in li)
>>> max(int(l[2]) for l in gli)
9
>>> max(int(l[2]) for l in zip(*li))
9

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