diff --git a/qcloud_cos/cos_client.py b/qcloud_cos/cos_client.py
index f3eff4bb..ce439a9f 100644
--- a/qcloud_cos/cos_client.py
+++ b/qcloud_cos/cos_client.py
@@ -826,6 +826,7 @@ def restore_object(self, Bucket, Key, RestoreRequest={}, **kwargs):
             auth=CosS3Auth(self._conf._secret_id, self._conf._secret_key, Key),
             headers=headers,
             params=params)
+        print rt.headers
         return None
 
     # s3 bucket interface begin
diff --git a/qcloud_cos/demo.py b/qcloud_cos/demo.py
index b88777f1..3d016146 100644
--- a/qcloud_cos/demo.py
+++ b/qcloud_cos/demo.py
@@ -4,6 +4,7 @@
 from qcloud_cos import CosServiceError
 from qcloud_cos import CosClientError
 
+import sys
 import logging
 
 # 腾讯云COSV5Python SDK, 目前可以支持Python2.6与Python2.7