fix lint

Author: dyuliu

mtv/utils.py

@@ -3,13 +3,14 @@
 import logging
 import os
 
-from yaml import load, dump
+from bson import ObjectId
+from yaml import load
+
 try:
-    from yaml import CLoader as Loader, CDumper as Dumper
+    from yaml import CLoader as Loader
 except ImportError:
-    from yaml import Loader, Dumper
+    from yaml import Loader
 
-from bson import ObjectId
 
 LOGGER = logging.getLogger(__name__)