X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/8e0303a592671af3578af904370d226f4991e635..446e64dc143148e52a126fa502bf63299c94197e:/sdk/python/arvados/collection.py?ds=sidebyside

diff --git a/sdk/python/arvados/collection.py b/sdk/python/arvados/collection.py
index 1f5067360d..7f78365fb5 100644
--- a/sdk/python/arvados/collection.py
+++ b/sdk/python/arvados/collection.py
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 from __future__ import absolute_import
 from future.utils import listitems, listvalues, viewkeys
 from builtins import str
@@ -360,7 +364,7 @@ class CollectionWriter(CollectionBase):
 
     def portable_data_hash(self):
         stripped = self.stripped_manifest().encode()
-        return hashlib.md5(stripped).hexdigest() + '+' + str(len(stripped))
+        return '{}+{}'.format(hashlib.md5(stripped).hexdigest(), len(stripped))
 
     def manifest_text(self):
         self.finish_current_stream()
@@ -1085,7 +1089,7 @@ class RichCollectionBase(CollectionBase):
             return self._portable_data_hash
         else:
             stripped = self.portable_manifest_text().encode()
-            return hashlib.md5(stripped).hexdigest() + '+' + str(len(stripped))
+            return '{}+{}'.format(hashlib.md5(stripped).hexdigest(), len(stripped))
 
     @synchronized
     def subscribe(self, callback):