CODE EXAMPLE FOR PYTHON

register template tag django

'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
            'libraries':  {
                'dict_key': 'blogs.templatetags.dict_key',
            }