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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, index_models=[]):
 """ Get the list of items for this view. Returns ``self.queryset`` if defined and is a ``self.object_class`` instance. @:param index_models: override `self.index_models` """

        if self.queryset is not None and isinstance(self.queryset, self.object_class):
            queryset = self.queryset.all()
        else:
            queryset = self.object_class()._clone()
            if len(index_models):
                queryset = queryset.models(*index_models)
            elif len(self.index_models):
                queryset = queryset.models(*self.index_models)
        return queryset