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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_queryset(self, **filter_kwargs):
 """ Get the list of items for this view. This will call the `get_parent_object` method before doing anything else to ensure that a valid parent object is present. If a parent_object is returned it gets set to `self.parent_object`. If a queryset has been set then that queryset will be used. Otherwise the default manager for the provided model will be used. Once we have a queryset, the `get_filter` method is called and added to the queryset which is then returned. """

        self.parent_object = self.get_parent_object()

        if self.queryset is not None:
            queryset = self.queryset
            if hasattr(queryset, '_clone'):
                queryset = queryset._clone()
        elif self.model is not None:
            queryset = self.model._default_manager.filter()
        else:
            raise ImproperlyConfigured(u"'%s' must define 'queryset' or 'model'"
                                       % self.__class__.__name__)

        q_objects = self.get_filter(**filter_kwargs)
        queryset = queryset.filter()
        for q in q_objects:
            queryset = queryset.filter(q)

        return queryset