allow url encoding inside django template

urlencode_tags.py

from django import template
from django.conf import settings
from django.utils.http import urlencode


register = template.Library()


@register.simple_tag(name='urlencode')
def urlencode_(*args, **kwargs):
    if settings.DEBUG:
        for arg in args:
            if arg in kwargs:
                raise ValueError("urlencode got multiple values for attribute '{}'".format(arg))

    args = urlencode({arg:'' for arg in args}).replace('=', '')
    kwargs = urlencode(kwargs)

    if args and kwargs:
        return '{}&{}'.format(args, kwargs)

    return args or kwargs