Pass context variables to template tags.

getradiomagic.py

from django import template
import main.models         						# @@TODO this might be a reason to put frame components in a separate file some day
import logging

logger = logging.getLogger(__name__)

register = template.Library()

@register.tag(name="getradiomagic")
def getradiomagic(parser, token):
	tag, category = token.split_contents()	
	return MagicNode(category)

class MagicNode(template.Node):
  def __init__(self, category):
    self.new_category = template.Variable(category)  
  def render(self, context):
		return self.new_category.resolve(context)

magicradio.html

{% load getradiomagic %}
{% block magicradio %}
{% if not nolabel %}
  <label for="{{ field.id }}" {% if field.required %}class="required"{% endif %}> {{ field.label }} </label>
{% endif %}
{% for option_value, option_label in field.field.choices %}
	<input type="radio" name="{{ option_value }}" value=""{% if field.value == option_value|safe %}selected="selected"{% endif %}/>
	<label>{{ option_label }}</label>
	<span>{% getradiomagic field.name %}</span>
{% endfor %}
{{ field.help_text }}
{% endblock %}