Fix string concat in gs_utils

py/utils/gs_utils.py

 #!/usr/bin/python
 
 # pylint: disable=C0301
 """
 Copyright 2014 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 Utilities for accessing Google Cloud Storage, using the boto library (wrapper
@@ skipping 395 matching lines @@
             self.upload_file(
                 source_path=os.path.join(source_dir, rel_path),
                 dest_bucket=b,
                 dest_path=posixpath.join(dest_dir, rel_path),
                 upload_if=self.UploadIf.ALWAYS,
                 **kwargs)
             q.task_done()
             break
           except Exception as error:
             if retry < retries - 1:
-              print '  Retrying upload, attempt #%d' % retry + 1
+              print '  Retrying upload, attempt #%d' % (retry + 1)
               time.sleep(2 ** retry)
             else:
               err[rel_path] = error
 
     for _ in range(num_threads):
       t = threading.Thread(target=worker)
       t.daemon = True
       t.start()
 
     # Block until all files have been uploaded and all workers have exited.
@@ skipping 299 matching lines @@
 
 def _get_local_md5(path):
   """Returns the MD5 hash of a file on local disk."""
   hasher = hashlib.md5()
   with open(path, 'rb') as f:
     while True:
       data = f.read(64*1024)
       if not data:
         return hasher.hexdigest()
       hasher.update(data)