diff --git a/tutorial/py/PythonClient.py b/tutorial/py/PythonClient.py
index 05f1719..cf96040 100755
--- a/tutorial/py/PythonClient.py
+++ b/tutorial/py/PythonClient.py
@@ -44,7 +44,7 @@
     quotient = client.calculate(1, work)
     print 'Whoa? You know how to divide by zero?'
   except InvalidOperation, io:
-    print 'InvalidOperation: %s' % (io.__str__())
+    print 'InvalidOperation: %r' % io
 
   work.op = Operation.SUBTRACT
   work.num1 = 15
diff --git a/tutorial/py/PythonServer.py b/tutorial/py/PythonServer.py
index 111c44e..d7fc89c 100755
--- a/tutorial/py/PythonServer.py
+++ b/tutorial/py/PythonServer.py
@@ -25,7 +25,7 @@
     return n1+n2
 
   def calculate(self, logid, work):
-    print 'calculate(%d, %s)' % (logid, work.__str__())
+    print 'calculate(%d, %r)' % (logid, work)
 
     if work.op == Operation.ADD:
       val = work.num1 + work.num2