tallowen/django-browserid — comment on commit 168f9159da68654dd23f9ae50164ec026db4bbf2
File:  line 0
By fwenzel:

I actually like Mike's suggestion. Get rid of the multiple settings and just have one. Using a string that represents a callable is definitely "djangoy" if not pythonic (FWIW if you did the subclassing, you'd *still* need to have a setting pointing to the right class, so that doesn't buy us anything).