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Sort a list containing paths in Python.

I have a list paths_listthat contains the path to the files (images) of a specific folder. Example:

['/home/username/images/s1/4.jpg', '/home/username/images/s1/7.jpg', '/home/username/images/s1/6.jpg', '/home/username/images/s1/3.jpg', '/home/username/images/s1/5.jpg', '/home/username/images/s1/10.jpg', '/home/username/images/s1/9.jpg', '/home/username/images/s1/1.jpg', '/home/username/images/s1/2.jpg', '/home/username/images/s1/12.jpg', '/home/username/images/s1/11.jpg', '/home/username/images/s1/8.jpg']

I want to sort in the following order: [/1.jpg ,2.jpg .....,/12.jpg] Neither sorting by length nor alphabetical order helps. What to do here?

+4
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4 answers

sorted lambda. os, ( basename), ( splitext), int, .

>>> import os
>>> l = ['/home/username/images/s1/4.jpg', '/home/username/images/s1/7.jpg', '/home/username/images/s1/6.jpg', '/home/username/images/s1/3.jpg', '/home/username/images/s1/5.jpg', '/home/username/images/s1/10.jpg', '/home/username/images/s1/9.jpg', '/home/username/images/s1/1.jpg', '/home/username/images/s1/2.jpg', '/home/username/images/s1/12.jpg', '/home/username/images/s1/11.jpg', '/home/username/images/s1/8.jpg']
>>> sorted(l, key=lambda i: int(os.path.splitext(os.path.basename(i))[0]))
['/home/username/images/s1/1.jpg',
 '/home/username/images/s1/2.jpg',
 '/home/username/images/s1/3.jpg',
 '/home/username/images/s1/4.jpg',
 '/home/username/images/s1/5.jpg',
 '/home/username/images/s1/6.jpg',
 '/home/username/images/s1/7.jpg',
 '/home/username/images/s1/8.jpg',
 '/home/username/images/s1/9.jpg',
 '/home/username/images/s1/10.jpg',
 '/home/username/images/s1/11.jpg',
 '/home/username/images/s1/12.jpg']
+14

(. ): .

from natsort import natsorted
l = ['/home/username/images/s1/4.jpg', '/home/username/images/s1/7.jpg', '/home/username/images/s1/6.jpg', '/home/username/images/s1/3.jpg', '/home/username/images/s1/5.jpg', '/home/username/images/s1/10.jpg', '/home/username/images/s1/9.jpg', '/home/username/images/s1/1.jpg', '/home/username/images/s1/2.jpg', '/home/username/images/s1/12.jpg', '/home/username/images/s1/11.jpg', '/home/username/images/s1/8.jpg']
natsorted(l)


['/home/username/images/s1/1.jpg',
'/home/username/images/s1/2.jpg',
'/home/username/images/s1/3.jpg',
'/home/username/images/s1/4.jpg',
'/home/username/images/s1/5.jpg',
'/home/username/images/s1/6.jpg',
'/home/username/images/s1/7.jpg',
'/home/username/images/s1/8.jpg',
'/home/username/images/s1/9.jpg',
'/home/username/images/s1/10.jpg',
'/home/username/images/s1/11.jpg',
'/home/username/images/s1/12.jpg']

, ( ), .

+5

split "/", , ".", int:

l = ['/home/username/images/s1/4.jpg', '/home/username/images/s1/7.jpg', '/home/username/images/s1/6.jpg', '/home/username/images/s1/3.jpg', '/home/username/images/s1/5.jpg', '/home/username/images/s1/10.jpg', '/home/username/images/s1/9.jpg', '/home/username/images/s1/1.jpg', '/home/username/images/s1/2.jpg', '/home/username/images/s1/12.jpg', '/home/username/images/s1/11.jpg', '/home/username/images/s1/8.jpg']
sorted_list = sorted(l, key = lambda x: int(x.split("/")[-1].split(".")[0]))


['/home/username/images/s1/1.jpg',
 '/home/username/images/s1/2.jpg',
 '/home/username/images/s1/3.jpg',
 '/home/username/images/s1/4.jpg',
 '/home/username/images/s1/5.jpg',
 '/home/username/images/s1/6.jpg',
 '/home/username/images/s1/7.jpg',
 '/home/username/images/s1/8.jpg',
 '/home/username/images/s1/9.jpg',
 '/home/username/images/s1/10.jpg',
 '/home/username/images/s1/11.jpg',
 '/home/username/images/s1/12.jpg']
+1

. .

from os.path import basename,splitext
path_list = ['/home/username/images/s1/4.jpg', '/home/username/images/s1/7.jpg',
             '/home/username/images/s1/6.jpg', '/home/username/images/s1/3.jpg',
             '/home/username/images/s1/5.jpg', '/home/username/images/s1/10.jpg',
             '/home/username/images/s1/9.jpg', '/home/username/images/s1/1.jpg',
             '/home/username/images/s1/2.jpg', '/home/username/images/s1/12.jpg',
             '/home/username/images/s1/11.jpg', '/home/username/images/s1/8.jpg']

new_list = [splitext(basename(x))[0] for x in path_list]

fin_list = list(zip(path_list,new_list))

fin_list = [x[0] for x in sorted(fin_list,key=lambda x: int(x[1]))]

print(fin_list)

1) , . 1,2,.. ..

new_list = [splitext(basename(x))[0] for x in path_list]

: [0]?? splitext(basename(x))[0] ,

('1','.jpg') , ('4','.jpg')

[0] 0th !

2) zip . , ,

fin_list = list(zip(path_list,new_list))
#output
('/home/username/images/s1/4.jpg','4.jpg')

3) [x[0] for x in sorted(fin_list,key=lambda x: int(x[1]))]

fin_list note key. i.e 4,3,7,.. . .

, :

['/home/username/images/s1/1.jpg', '/home/username/images/s1/2.jpg',
 '/home/username/images/s1/3.jpg', '/home/username/images/s1/4.jpg',
 '/home/username/images/s1/5.jpg', '/home/username/images/s1/6.jpg', 
'/home/username/images/s1/7.jpg', '/home/username/images/s1/8.jpg',
 '/home/username/images/s1/9.jpg', '/home/username/images/s1/10.jpg',
 '/home/username/images/s1/11.jpg', '/home/username/images/s1/12.jpg']
0

Source: https://habr.com/ru/post/1679966/

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