Merge branch '8784-dir-listings'

[arvados.git] / sdk / python / arvados / collection.py

diff --git a/sdk/python/arvados/collection.py b/sdk/python/arvados/collection.py
index d4f24047d22d3116f50382ed615f88c945590c38..77312e4d4917a276f00b46e90e13ab13ba0d5ac4 100644 (file)
--- a/sdk/python/arvados/collection.py
+++ b/sdk/python/arvados/collection.py
@@ -1085,7 +1085,7 @@ 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):