Natsort lets you apply natural sorting to your sequences easily, for example:

>>> from natsort import natsorted >>> a = ['a2', 'a9', 'a1', 'a4', 'a10'] >>> data = [['a1', 'a5'], ['a1', 'a40'], ['a10', 'a1'], ['a2', 'a5']] >>> natsorted(a) ['a1', 'a2', 'a4', 'a9', 'a10' >>> natsorted(data) [['a1', 'a5'], ['a1', 'a40'], ['a2', 'a5'], ['a10', 'a1']]

natsort identifies the numbers and sorts them separately from strings.

natsort comes with a shell script to use natural sorting in shell scripts. You can also execute natsort from the command line with Python -m natsort.

There exists another natural sorting package for Python called python-naturalsort. You may prefer that package if you wish to only sort version numbers.

This is the Python 3 version of the package.