Python sort array of string with integers inside

Question

How i can use python to sort the list format

format=["12 sheet","4 sheet","48 sheet","6 sheet", "busrear", "phonebox","train"]

like this way

format =["4 sheet", "6 sheet", "12 sheet", "48 sheet", "busrear, "phonebox", "train"]

edit: If the array is a list of list then how can we do that like this one

format=[[1L, u'12 sheet', 0],[2L, u'4 sheet', 0], [3L, u'48 sheet', 0], [4L, u'6 sheet', 0 [5L, u'Busrear', 0], [6L, u'phonebox', 0], [7L, u'train', 0]]

score 5 · Accepted Answer · answered Feb 27 '14 at 05:51

5

>>> fmts =["12 sheet","4 sheet","48 sheet","6 sheet", "busrear", "phonebox","train"]
>>> fmts.sort(key=lambda x: (int(x.split(None, 1)[0]) if x[:1].isdigit() else 999, x))
>>> fmts
['4 sheet', '6 sheet', '12 sheet', '48 sheet', 'busrear', 'phonebox', 'train']

format is a builtin function. Do not use it as a variable name. It will shadow the builtin function.

answered Feb 27 '14 at 05:51

falsetru

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@thefourtheye, Used `x[:1]` to prevent IndexError. – falsetru Feb 27 '14 at 05:52
Wouldn't that be better if `else x` instead of `else 999`? – thefourtheye Feb 27 '14 at 05:53
@thefourtheye, You can't compare `int` with `str` in Python 3.x; causes `TypeError: unorderable types: str() < int()` – falsetru Feb 27 '14 at 05:55
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@thefourtheye, Specific version is not mentioned. So I provided a solutioni that can be run both in Python 2.x/3.x. – falsetru Feb 27 '14 at 05:56
Hey thanks for answer but if the list will be a list of list then how we will sort it – Binit Singh Feb 27 '14 at 10:50
@question, What is the expected output for the given list? – falsetru Feb 27 '14 at 14:48

score 0 · Answer 2 · edited Feb 27 '14 at 05:52

0

you can create an intermediate array that looks like the following:

intermediate = [(12, "sheet"), (4, "sheet"), ... ]

then you can use sorted on intermediate which will sort by first value by default.

then get back to your format.

edited Feb 27 '14 at 05:52

thefourtheye

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answered Feb 27 '14 at 05:51

Saher Ahwal

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Python sort array of string with integers inside

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