Method operator()

imperative/python/src/tensor.cpp:829–834

    TensorWeakRef(const TensorWrapper& tw) : data(tw.m_tensor->data()) {}

    py::object operator()() {
        if (auto p = data.lock()) {
            return TensorWrapper::make(py_tensor_type, p);
        }
        return py::none();
    }
};

#ifdef METH_FASTCALL