diff --git a/paddle/pybind/protobuf.cc b/paddle/pybind/protobuf.cc
index bfbe177e8f2a95c8835d32077d43819ef1ad00c5..b86185bf5bf9589ac207141ab6c6eb1e4b8e4696 100644
--- a/paddle/pybind/protobuf.cc
+++ b/paddle/pybind/protobuf.cc
@@ -17,6 +17,25 @@ limitations under the License. */
 namespace paddle {
 namespace pybind {
 
+template <typename T>
+inline std::vector<T> RepeatedToVector(
+    const google::protobuf::RepeatedField<T> &repeated_field) {
+  std::vector<T> ret;
+  ret.reserve(repeated_field.size());
+  std::copy(
+      repeated_field.begin(), repeated_field.end(), std::back_inserter(ret));
+  return ret;
+}
+
+template <typename T, typename RepeatedField>
+inline void VectorToRepeated(const std::vector<T> &vec,
+                             RepeatedField *repeated_field) {
+  repeated_field->Reserve(vec.size());
+  for (auto &elem : vec) {
+    *repeated_field->Add() = elem;
+  }
+}
+
 void BindProgramDesc(py::module &m) {
   using namespace paddle::framework;  // NOLINT
   py::class_<ProgramDesc>(m, "ProgramDesc", "")
@@ -70,10 +89,7 @@ void BindVarDsec(py::module &m) {
            [](VarDesc &self, const std::string &name) { self.set_name(name); })
       .def("set_shape",
            [](VarDesc &self, const std::vector<int64_t> &dims) {
-             LoDTensorDesc *lod_tensor_desc = self.mutable_lod_tensor();
-             for (const int64_t &i : dims) {
-               lod_tensor_desc->add_dims(i);
-             }
+             VectorToRepeated(dims, self.mutable_lod_tensor()->mutable_dims());
            })
       .def("set_data_type",
            [](VarDesc &self, int type_id) {
@@ -82,12 +98,7 @@ void BindVarDsec(py::module &m) {
            })
       .def("shape", [](VarDesc &self) {
         const LoDTensorDesc &lod_tensor_desc = self.lod_tensor();
-        int rank = lod_tensor_desc.dims_size();
-        std::vector<int64_t> res(rank);
-        for (int i = 0; i < rank; ++i) {
-          res[i] = lod_tensor_desc.dims(i);
-        }
-        return res;
+        return RepeatedToVector(lod_tensor_desc.dims());
       });
 }
 
diff --git a/paddle/pybind/protobuf.h b/paddle/pybind/protobuf.h
index de9a008e25d1e7b076eabea4f83fc71dfca881da..2721c128d1290ee0b1246d877d9e5ea9c4ae24ec 100644
--- a/paddle/pybind/protobuf.h
+++ b/paddle/pybind/protobuf.h
@@ -27,25 +27,6 @@ namespace py = pybind11;
 namespace paddle {
 namespace pybind {
 
-template <typename T>
-inline std::vector<T> RepeatedToVector(
-    const google::protobuf::RepeatedField<T>& repeated_field) {
-  std::vector<T> ret;
-  ret.reserve(repeated_field.size());
-  std::copy(
-      repeated_field.begin(), repeated_field.end(), std::back_inserter(ret));
-  return ret;
-}
-
-template <typename T, typename RepeatedField>
-inline void VectorToRepeated(const std::vector<T>& vec,
-                             RepeatedField* repeated_field) {
-  repeated_field->Reserve(vec.size());
-  for (auto& elem : vec) {
-    *repeated_field->Add() = elem;
-  }
-}
-
 void BindProgramDesc(py::module& m);
 void BindBlockDesc(py::module& m);
 void BindVarDsec(py::module& m);