[Django]-Django display context data in template without calling view through url

It sounds like you want to add certain variables to the context of every view, rather than just this one.

One way to do it is using a context processor:

# myapp/context_processors.py

def notifications(request):
    "Context processor for adding notifications to the context."
    return {
        'unseen_notifications': Notification.objects.filter(
            body__user=request.user).filter(viewed=False),
        'seen_notifications': Notification.objects.filter(
            body__user=request.user).filter(viewed=True),
    }

You’d also need to add the context processor to TEMPLATE_CONTEXT_PROCESSORS:

# settings.py

...
TEMPLATE_CONTEXT_PROCESSORS = (
    ...
    'myapp.context_processors.notifications',
)