diff --git a/dygraph/cvlibs/manager.py b/dygraph/cvlibs/manager.py
index c76fde4130ae582f6417470cfe36c36d52b9a8b1..48a9ec813cf200c305da04976d755ad3169d7887 100644
--- a/dygraph/cvlibs/manager.py
+++ b/dygraph/cvlibs/manager.py
@@ -89,6 +89,5 @@ class ComponentManager:
     def __len__(self):
         return len(self._components_dict)
 
-    def __str__(self):
-        print_str = "{}({})".format(self.__class__.__name__, self._components_dict)
-        return print_str
\ No newline at end of file
+    def __repr__(self):
+        return "{}:{}".format(self.__class__.__name__, list(self._components_dict.keys()))
\ No newline at end of file