docs: def exclude(self, **filters):
          """
          Applies query filters for excluding matching records from result set.
  
          Args:
              **filters: Query filters as keyword arguments.
  
          Returns:
              Self. Queryset object.
  
          Examples:
              >>> Person.objects.exclude(age=None)
              >>> Person.objects.filter(name__startswith='jo').exclude(age__lte=16)
          """
          exclude = {'-%s' % key: value for key, value in filters.items()}
          return self.filter(**exclude)