Question

import csv

with open('scores.csv') as handle:
    reader = csv.reader(handle)
    for row in list(reader)[1:]:
        user, *scores = row
        average = sum([int(score) for score in scores]) / len(scores)
        print (
            "{user} has average of {average}".format(user=user,average=average)
        )

由于*分数，此代码在python 2.7中不起作用。我如何将其更改为python 2.7，因为我不知道如何？

此代码取自此主题：Row Average CSV Python

Answer 1

更改行

user, *scores = row

到

user, scores = row[0], row[1:]

除了上述内容外，您还应该更改

average = sum([int(score) for score in scores]) / len(scores)

到

average = sum([int(score) for score in scores]) / float(len(scores))

Python 2.X中的除法是整数除法。或者，您也可以从未来导入实际部门

from __future__ import division

并使用整数除法使用双正斜杠＆＃39; //＆＃39;

Answer 2

你应该让我们的代码与python 3尽可能兼容，以及将来的导入：

from __future__ import division, print_function
import csv

with open('scores.csv') as handle:
    reader = csv.reader(handle)
    next(reader) # header
    for row in reader:
        user = row[0]
        scores = row[1:]
        average = sum(int(score) for score in scores) / len(scores)
        print (
        "{user} has average of {average}".format(user=user, average=average)
        )

这段代码如何转换成python 2？

2 个答案: