commit 5b63acd31e0e40c1a9a9e9762905b0054ff37994
author Benjamin Peterson <benjamin@python.org> Sat Mar 29 15:24:25 2008 +0000
committer Benjamin Peterson <benjamin@python.org> Sat Mar 29 15:24:25 2008 +0000
tree 763a6e10d4c0fa64797f5311491a3cbeb0f7e5d9
parent 672fbf519568bc295aa64992dcbabe0eebccb5fc

#2503 make singletons compared with "is" not == or !=
Thanks to Wummel for the patch

Lib/xml/sax/expatreader.py

diff --git a/Lib/xml/sax/expatreader.py b/Lib/xml/sax/expatreader.py
index bb9c294..e6d1902 100644
--- a/Lib/xml/sax/expatreader.py
+++ b/Lib/xml/sax/expatreader.py
@@ -107,7 +107,7 @@
         xmlreader.IncrementalParser.parse(self, source)
 
     def prepareParser(self, source):
-        if source.getSystemId() != None:
+        if source.getSystemId() is not None:
             self._parser.SetBase(source.getSystemId())
 
     # Redefined setContentHandler to allow changing handlers during parsing