fixing the way how to sort element in a list using python sorted method

I have this list containing the following images with these the name structure "number.image"

• The list stores the elements of a local folder based on a path.

[1.image, 2.image, 3.image, 4.image, 5.image, 6.image, 7.image, 8.image, 9.image, 10.image, 11.image, 12.image, 13.image]

applying the python build-in sorted() method to make sure the elements in the list are sorted in proper manner I got this result. As you see the order is not correct.

1.image 
10.image
11.image
12.image
13.image
2.image
3.image
4.image
5.image
6.image
7.image
8.image
9.image

If you want to use the inbuilt sorted function and not install a third-party library such as natsort, you can use a lambda for the key argument that interprets the stem of the file as an integer:

>>> from pathlib import Path
>>> filenames = [
...     '1.image',
...     '10.image',
...     '11.image',
...     '12.image',
...     '13.image',
...     '2.image',
...     '3.image',
...     '4.image',
...     '5.image',
...     '6.image',
...     '7.image',
...     '8.image',
...     '9.image',
... ]
>>> sorted_filenames = sorted(filenames, key=lambda f: int(Path(f).stem))
>>> # Arguably less readable alternative using list indexing  splitting on the period manually: 
>>> # sorted_filenames = sorted(filenames, key=lambda f: int(f.split('.')[0]))
>>> print('\n'.join(sorted_filenames))
1.image
2.image
3.image
4.image
5.image
6.image
7.image
8.image
9.image
10.image
11.image
12.image
13.image