SF patch 1631942 by Collin Winter:
(a) "except E, V" -> "except E as V"
(b) V is now limited to a simple name (local variable)
(c) V is now deleted at the end of the except block
diff --git a/Lib/py_compile.py b/Lib/py_compile.py
index 1cb41f1..23c5d18 100644
--- a/Lib/py_compile.py
+++ b/Lib/py_compile.py
@@ -123,7 +123,7 @@
         codestring = codestring + '\n'
     try:
         codeobject = __builtin__.compile(codestring, dfile or file,'exec')
-    except Exception,err:
+    except Exception as err:
         py_exc = PyCompileError(err.__class__,err.args,dfile or file)
         if doraise:
             raise py_exc
@@ -157,7 +157,7 @@
     for filename in args:
         try:
             compile(filename, doraise=True)
-        except PyCompileError,err:
+        except PyCompileError as err:
             sys.stderr.write(err.msg)
 
 if __name__ == "__main__":