按数字对字符串进行排序 [英] sort string by number inside

问题描述

我想知道如何根据内部数字对字符串进行排序.

I would like to know how can I sort a string by the number inside.

例如，我有:

hello = " hola %d" % (number_from_database)
bye = "adios %d" % (number_from_database_again)

即使数字发生变化，我也要按数字对它们进行排序.

I want to sort them by the number even if it changes.

推荐答案

您可以传递密钥进行排序:

You can pass a key to sort:

sorted(l, key=lambda x: int(re.sub('\D', '', x)))

例如:

In [1]: import re

In [2]: l = ['asdas2', 'asdas1', 'asds3ssd']

In [3]: sorted(l, key=lambda x: int(re.sub('\D', '', x)))
Out[3]: ['asdas1', 'asdas2', 'asds3ssd']

re.sub('\D', '', x)替换除数字外的所有字符.

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