human
Complete this python program:
def create_generic_related_manager(superclass):
assistant
#Here is the Python code you requested.

    """Factory function for a manager that subclasses \superclass\ (which is a
    Manager) and adds behavior for generic related objects.
    """
    class GenericRelatedObjectManager(superclass, ):
        def __init__(self, model=None, core_filters=None, instance=None, symmetrical=None, join_table=None, source_col_name=None, target_col_name=None, content_type=None, content_type_field_name=None, object_id_field_name=None):
            super(GenericRelatedObjectManager, self).__init__()
            self.core_filters = (core_filters or {})
            self.model = model
            self.content_type = content_type
            self.symmetrical = symmetrical
            self.instance = instance
            self.join_table = join_table
            self.join_table = model._meta.db_table
            self.source_col_name = source_col_name
            self.target_col_name = target_col_name
            self.content_type_field_name = content_type_field_name
            self.object_id_field_name = object_id_field_name
            self.pk_val = self.instance._get_pk_val()
        def get_query_set(self):
            query = {('%s__pk' % self.content_type_field_name): self.content_type.id, ('%s__exact' % self.object_id_field_name): self.pk_val}
            return superclass.get_query_set(self).filter(**query)
        def add(self, *objs):
            for obj in objs:
                setattr(obj, self.content_type_field_name, self.content_type)
                setattr(obj, self.object_id_field_name, self.pk_val)
                obj.save()
        add.alters_data = True
        def remove(self, *objs):
            for obj in objs:
                obj.delete()
        remove.alters_data = True
        def clear(self):
            for obj in self.all():
                obj.delete()
        clear.alters_data = True
        def create(self, **kwargs):
            kwargs[self.content_type_field_name] = self.content_type
            kwargs[self.object_id_field_name] = self.pk_val
            obj = self.model(**kwargs)
            obj.save()
            return obj
        create.alters_data = True
    return GenericRelatedObjectManager