如何在python中生成列表中列出最多的项目

Question

我想生成打印列表中列出最多的项目

例如，

aList = ["SE","CpE","SE","CS","CS","SE"]

，结果应为

aList = ["SE"]

这是列出最多的项目。 请帮助！

Answer 1

from collections import Counter

a = Counter(aList)
a.most_common()[0]

http://docs.python.org/2/library/collections.html#collections.Counter

Answer 2

有很多这样的问题，但无论如何。

您可以使用stdlib＆＃39; s collections.Counter：

执行此操作

from collections import Counter

a = Counter(aList)
a.most_common()[0]

或者您可以编写自己的类/函数：

def count(list):
    items = {}
    for item in list:
        if item not in items:
            items[item] = 0
        items[item] += 1
    return items

>>> count(["SE","CpE","SE","CS","CS","SE"])
{"SE": 3,...}