django自定义过滤器实例[Python框架]

django自定义过滤器实例[Python框架]

需求:通过以键方式从字典中取值,如 test[key]=value

views.py

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))

1.在app目录下建立templatetags/在此目录下建立空文件__init__.py和myfilter.py

2.在myfilter.py编辑

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)

3.在模板中使用

{% load myfilter %} #加载自定认标签

{{dicts|key:"key1"}}



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