register template tag django

1'OPTIONS': {
2            'context_processors': [
3                'django.template.context_processors.debug',
4                'django.template.context_processors.request',
5                'django.contrib.auth.context_processors.auth',
6                'django.contrib.messages.context_processors.messages',
7            ],
8            'libraries':  {
9                'dict_key': 'blogs.templatetags.dict_key',
10            }
11