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-rw-r--r--Lib/xml/sax/expatreader.py2
1 files changed, 1 insertions, 1 deletions
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 @@ class ExpatParser(xmlreader.IncrementalParser, xmlreader.Locator):
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