from django.template import RequestContext
from django.shortcuts import render_to_response
def view(request)
 dicts = {"key1": 1, "key2": 2, "key3": 3, }
 return render_to_response("index.html", {"dicts":dicts,},context_instance = RequestContext(request))

from django import template
register = template.Library()
def key(d,key_name):
 value = 0
 try:
 value = d[key_name]
 except KeyError:
 value = 0
 return value
register.filter('key',key)

{% load myfilter %} #加載自定認標簽
{{dicts|key:"key1"}}