using filter in django template code example

Example 1: filter django or

#It is worth to note that it's possible to add Q expressions.
from django.db.models import Q

query = Q(first_name='mark')
query.add(Q(email='[email protected]'), Q.OR)
query.add(Q(last_name='doe'), Q.AND)

queryset = User.objects.filter(query)

Example 2: filter field set in django formds

from django.contrib.auth.decorators import login_required

@login_required
def agregar_producto(request):