Python-在包含字符串和数字的列表中对数字值进行排序 [英] Python - Ordering Number Values in a List Containing Strings and Numbers

问题描述

我已经创建了一个列表，其中包含python分数文件中的所有信息.

I have Created a list which contains all of the information from a scores file in python.

得分.txt文件:

Dan Danson,9,6,1
John Johnson,5,7,10
Mike Mikeson,10,7,6

我这样做是为了将.txt文件中的信息获取到二维列表中:

I did this to get the information from the .txt file into a 2d list:

f = open(filename, 'r')
lines = f.readlines()
f.close()

scores = []
for line in lines: #Loads lines into a 2d list
    currentline = line.strip('\n').split(",")
    scores.append(currentline)

现在我有了这个列表:

[['Dan Danson', '1', '6', '9'], ['John Johnson', '5', '7', '10'], ['Mike Mikeson', '10', '7', '6']]

从此列表中，我想对列表中的数字进行排序，以使它们从最高到最低排序，因此我得到一个看起来像这样的列表:

From this list I would like to sort the numbers in the list so that they are ordered from highest to lowest so i get a list that looks like this:

[['Dan Danson', '9', '6', '1'], ['John Johnson', '10', '7', '5'], ['Mike Mikeson', '10', '7', '6']]

最后，我希望能够按从高到低的顺序打印列表.

Finally I want to be able to print the list ordered highest to lowest.

Mike Mikeson,10,7,6
John Johnson,10,7,5
Dan Danson,9,6,1

推荐答案

使用 sorted ，其中 int 作为关键功能:

Using sorted with int as a key function:

>>> rows = [
...     ['Dan Danson', '1', '6', '9'],
...     ['John Johnson', '5', '7', '10'],
...     ['Mike Mikeson', '10', '7', '6'],
... ]
>>>
>>> rows = [row[:1] + sorted(row[1:], key=int, reverse=True) for row in rows]
>>> sorted(rows, key=lambda row: sum(map(int, row[1:])), reverse=True)
[['Mike Mikeson', '10', '7', '6'],
 ['John Johnson', '10', '7', '5'],
 ['Dan Danson', '9', '6', '1']]

• sorted(row[1:], ..):单独的数字值和排序.
• row[:1]:名称作为列表，或者您可以使用[row[0]].应该是要连接到数字字符串列表的列表.
• sorted(row[1:], ..): separate number values and sort.
• row[:1]: name as a list, alternatively you can use [row[0]]. Should be a list to be concatenated to a list of number strings.

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