X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/607fe087f6167061714a524dd53cbbc21b974973..93e4548df0ba8e98589dea7cdde60a851a2d9c2f:/sdk/python/arvados/collection.py?ds=sidebyside

diff --git a/sdk/python/arvados/collection.py b/sdk/python/arvados/collection.py
index 5008450ede..d4f24047d2 100644
--- a/sdk/python/arvados/collection.py
+++ b/sdk/python/arvados/collection.py
@@ -360,7 +360,7 @@ 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()
@@ -725,7 +725,7 @@ class RichCollectionBase(CollectionBase):
     @synchronized
     def keys(self):
         """Get a list of names of files and collections directly contained in this collection."""
-        return viewkeys(self._items)
+        return self._items.keys()
 
     @synchronized
     def values(self):