As a user of the API, especially if you're specifying sort_type on a lot of columns, it's nice to have the option of doing

from ...DTSortType import NUMERIC

DataTablesColumn("foo", sort_type=NUMERIC)

instead of 

DataTablesColumn("foo", sort_type=DTSortType.NUMERIC)

Also http://www.python.org/dev/peps/pep-0008/#constants

Meh.