Add attributes to django forms with templatetags

supportTags.py

from django import template
register = template.Library()


@register.filter(name='addattr')
def addattr(field, attr):
    attrs={}
    attr_list = [i.strip() for i in attr.split('|')]
    for i in attr_list:
        attribute = [j.strip() for j in i.split(':')]
        attrs[attribute[0]]=attribute[1]
    return field.as_widget(attrs=attrs)