Django templatetag for giving an input a class matching its type attr

Django input class_name

from django.template import Library 
from django.conf import settings 
from django.template.defaultfilters import slugify
 
register = Library()
 
def input_class(input):
	try:
		slug = slugify(input.field.widget.__class__.__name__.replace('Input',''))
		if hasattr(input.field.widget, 'attrs') and 'class' in input.field.widget.attrs:
			slug += " " + input.field.widget.attrs['class']
		return slug
	except Exception, e:
		return ""
 
register.filter(input_class)