Stomp out more hsa_key() calls.
diff --git a/Lib/compiler/visitor.py b/Lib/compiler/visitor.py
index 9e39d36..f10f560 100644
--- a/Lib/compiler/visitor.py
+++ b/Lib/compiler/visitor.py
@@ -84,7 +84,7 @@
             meth(node, *args)
         elif self.VERBOSE > 0:
             klass = node.__class__
-            if not self.examples.has_key(klass):
+            if klass not in self.examples:
                 self.examples[klass] = klass
                 print
                 print self.visitor