X-Git-Url: https://wannabe.guru.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=collect%2Fbst.py;h=8602ce698d9c5d7970f890cfd97d97b8ccb4ffda;hb=7ff2af6fe7bffea90dc4a31c93140c189917c659;hp=9d6525946e8131728896d86f3400c38c5ba528e7;hpb=6ba90a1f30f1c0cf4df12fcd0c62181f29bc3668;p=python_utils.git

diff --git a/collect/bst.py b/collect/bst.py
index 9d65259..8602ce6 100644
--- a/collect/bst.py
+++ b/collect/bst.py
@@ -520,12 +520,12 @@ class BinarySearchTree(object):
             return x
 
         path = self.parent_path(node)
-        assert path[-1]
+        assert path[-1] is not None
         assert path[-1] == node
         path = path[:-1]
         path.reverse()
         for ancestor in path:
-            assert ancestor
+            assert ancestor is not None
             if node != ancestor.right:
                 return ancestor
             node = ancestor