On Apr 9, 8:52 am, Ben Racine <i3enha...@gmail.com> wrote: > I have a list... > ['dir_0_error.dat', 'dir_120_error.dat', 'dir_30_error.dat', > 'dir_330_error.dat'] > I want to sort it based upon the numerical value only. > Does someone have an elegant solution to this?
This approach doesn't rely on knowing the format of the string: >>> from string import maketrans, letters, punctuation >>> a = ['dir_0_error.dat', 'dir_120_error.dat', 'dir_30_error.dat', >>> 'dir_330_error.dat'] >>> def only_numbers(s): ... nums = s.translate(None, letters+punctuation) ... return int(nums) ... >>> a.sort(key=only_numbers) >>> a ['dir_0_error.dat', 'dir_30_error.dat', 'dir_120_error.dat', 'dir_330_error.dat'] If you're using Python 3.x, the string module has been removed, so you can find the maketrans function on str there. -- http://mail.python.org/mailman/listinfo/python-list
