render to response django

from django.shortcuts import get_object_or_404

def my_view(request):
    obj = get_object_or_404(MyModel, pk=1)

from django.http import Http404

def my_view(request):
    my_objects = list(MyModel.objects.filter(published=True))
    if not my_objects:
        raise Http404("No MyModel matches the given query.")