diff --git a/visualdl/logic/sdk.cc b/visualdl/logic/sdk.cc
index 8ac545813825734251c786d8e853f327c6ff1dc4..11b4393752781dc96b2ba0d8409467f7a390d86e 100644
--- a/visualdl/logic/sdk.cc
+++ b/visualdl/logic/sdk.cc
@@ -2,7 +2,7 @@
 
 namespace visualdl {
 
-namespace  components {
+namespace components {
 
 template <typename T>
 void components::Scalar<T>::AddRecord(int id, const std::vector<T> &values) {
diff --git a/visualdl/logic/sdk.h b/visualdl/logic/sdk.h
index 930fc24ede8bf9837679351bb00e0871fed18aca..e75fd7d17053e7d6e769d97debce97de164f5834 100644
--- a/visualdl/logic/sdk.h
+++ b/visualdl/logic/sdk.h
@@ -12,12 +12,15 @@ namespace components {
  */
 template <typename T>
 struct Scalar {
-  Scalar(Tablet tablet) : tablet_(tablet) { tablet_.SetType(Tablet::Type::kScalar);}
+  Scalar(Tablet tablet) : tablet_(tablet) {
+    tablet_.SetType(Tablet::Type::kScalar);
+  }
+
   void SetCaption(const std::string cap) {
     tablet_.SetCaptions(std::vector<std::string>({cap}));
   }
 
-  void AddRecord(int id, const std::vector<T> &values);
+  void AddRecord(int id, const std::vector<T>& values);
 
 private:
   Tablet tablet_;
@@ -33,7 +36,7 @@ struct ScalarReader {
   std::vector<std::string> captions() const;
   size_t size() const;
 
- private:
+private:
   TabletReader reader_;
 };