diff --git a/visualdl/logic/im.cc b/visualdl/logic/im.cc
index 94881244f8d5925e2a4cf3e0ac71169a5fdfdb1f..624fbfbba50fe623cc4226591e336fbb66af9552 100644
--- a/visualdl/logic/im.cc
+++ b/visualdl/logic/im.cc
@@ -25,27 +25,6 @@ int ReserviorSample(int num_samples, int num_records) {
   return -1;
 }
 
-// IM::IM(StorageBase::Type type, StorageBase::Mode mode) {
-//   switch (type) {
-//     case StorageBase::Type::kMemory: {
-//       storage_.reset(new MemoryStorage);
-//     } break;
-//     default:
-//       CHECK(false) << "Unsupported storage kind " << type;
-//   }
-
-//   switch (mode) {
-//     case StorageBase::Mode::kRead:
-//       dynamic_cast<MemoryStorage *>(storage_.get())->StartReadService(500);
-//       break;
-//     case StorageBase::Mode::kWrite:
-//       dynamic_cast<MemoryStorage *>(storage_.get())->StartWriteSerice(500);
-//       break;
-//     default:
-//       break;
-//   }
-// }
-
 void IM::SetPersistDest(const std::string &path) {
   CHECK(storage_->mutable_data()->dir().empty())
       << "duplicate set storage's path";
diff --git a/visualdl/python/summary.py b/visualdl/python/summary.py
index 19a459b67b9c0bded263dd3cb62730375d799b94..db9cb1d2b5b81f0567b6effcd78e3fa910c74af4 100644
--- a/visualdl/python/summary.py
+++ b/visualdl/python/summary.py
@@ -103,15 +103,3 @@ def scalar(im, tag, dtype='float'):
     }
     obj = dtype2obj[dtype](im)
     return _Scalar(obj)
-
-
-# def read_scalar(tag, dtype='float'):
-#     tablet = core.im().tablet(tag)
-#     dtype2obj = {
-#         'float': tablet.as_float_scalar,
-#         'double': tablet.as_double_scalar,
-#         'int32': tablet.as_int32_scalar,
-#         'int64': tablet.as_int64_scalar,
-#     }
-#     obj = dtype2obj[dtype]()
-#     return _Scalar(obj)