Sort sets of objects by numbers in python

Question

I have a sequence of lists such as :

>>> result


  [['Human_COII_1000-4566_hsp', 'Human_COII_500-789_hsp', 'Human_COII_100-300_hsp'], ['Human_COI_100-300_hsp', 'Human_COI_500-789_hsp', 'Human_COI_1000-4566_hsp']]

and I would like with each list to sort them by the number-number and get:

[['Human_COII_100-300_hsp', 'Human_COII_500-789_hsp', 'Human_COII_1000-4566_hsp'], ['Human_COI_100-300_hsp', 'Human_COI_500-789_hsp', 'Human_COI_1000-4566_hsp']]

I tried:

for i in result:
    sorted(i)

but the order is not the one I wanted.

What are we sorting? There's a list of sets. The sets have items. Are we sorting the order of the sets, or do we want to make a list of all set elements and sort that? — Kenny Ostrom, Mar 25 '19 at 16:04
Sets do not have order. You can sort them, but when you make new sets of that, they won't be sorted. Although you can display them in order. — Kenny Ostrom, Mar 25 '19 at 16:06
This looks like what you want: https://stackoverflow.com/questions/1653970/does-python-have-an-ordered-set/1653974 — Kenny Ostrom, Mar 25 '19 at 16:10
So how could I display the items 3 inside these 2 sets in order? — chippycentra, Mar 25 '19 at 16:10
Maybe I can change into a list of list such as. [['Human_COII_1000-4566_hsp', 'Human_COII_500-789_hsp', 'Human_COII_100-300_hsp'], {'Human_COI_500-789_hsp', 'Human_COI_100-300_hsp', 'Human_COI_1000-4566_hsp']] ? — chippycentra, Mar 25 '19 at 16:11
I changed the post with a list of list in order to be cleared — chippycentra, Mar 25 '19 at 16:19

han solo · Accepted Answer · 2019-03-25T16:33:36.883

You could make a new sorted list using comprehension,

>>> import re
>>> x
[set(['Human_COII_1000-4566_hsp', 'Human_COII_100-300_hsp', 'Human_COII_500-789_hsp']), set(['Human_COI_100-300_hsp', 'Human_COI_500-789_hsp', 'Human_COI_1000-4566_hsp'])]
>>>
>>> # for python2
>>> [sorted(y, key=lambda item: map(int, re.findall(r'\d+', item))) for y in x]
[['Human_COII_100-300_hsp', 'Human_COII_500-789_hsp', 'Human_COII_1000-4566_hsp'], ['Human_COI_100-300_hsp', 'Human_COI_500-789_hsp', 'Human_COI_1000-4566_hsp']]
>>>
>>> # python3
>>> [sorted(y, key=lambda item: tuple(map(int, re.findall(r'\d+', item)))) for y in x]

Sort sets of objects by numbers in python

1 Answers1