fix bugs

Author: lewzylu

qcloud_cos/cos_client.py

@@ -55,7 +55,7 @@ def __init__(self, Appid=None, Region=None, Secret_id=None, Secret_key=None, Tok
         if Scheme is None:
             Scheme = 'http'
         if(Scheme != 'http' and Scheme != 'https'):
-            raise CosCosClientError('Scheme can be only set to http/https')
+            raise CosClientError('Scheme can be only set to http/https')
         self._scheme = Scheme
 
         # 兼容(SecretId,SecretKey)以及(AccessId,AccessKey)
@@ -1311,7 +1311,7 @@ def copy(self, Bucket, Key, CopySource, CopyStatus='Copy', PartSize=10, MAXThrea
             abort_response = self.abort_multipart_upload(Bucket=Bucket, Key=Key, UploadId=uploadid)
             raise e
         return rt
-   
+
     def append_object(self, Bucket, Key, Position, Data, **kwargs):
         """文件块追加接口
 
@@ -1341,7 +1341,7 @@ def append_object(self, Bucket, Key, Position, Data, **kwargs):
             headers=headers)
         response = rt.headers
         return response
-      
-      
+
+
 if __name__ == "__main__":
     pass