diff -r 5c078eb8da39 Tools/parser/unparse.py
--- a/Tools/parser/unparse.py	Mon Feb 24 01:27:06 2014 +0100
+++ b/Tools/parser/unparse.py	Fri Feb 28 02:30:47 2014 +1100
@@ -367,6 +367,15 @@
         self.dispatch(t.orelse)
         self.write(")")
 
+    def _ExceptExp(self, t):
+        self.write("(")
+        self.dispatch(t.body)
+        self.write(" except ")
+        self.dispatch(t.etype)
+        self.write(": ")
+        self.dispatch(t.value)
+        self.write(")")
+
     def _Set(self, t):
         assert(t.elts) # should be at least one element
         self.write("{")