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/token.py b/Lib/token.py
index 2770cfd..477827ac 100755
--- a/Lib/token.py
+++ b/Lib/token.py
@@ -93,7 +93,7 @@
         outFileName = args[1]
     try:
         fp = open(inFileName)
-    except IOError, err:
+    except IOError as err:
         sys.stdout.write("I/O error: %s\n" % str(err))
         sys.exit(1)
     lines = fp.read().split("\n")
@@ -113,7 +113,7 @@
     # load the output skeleton from the target:
     try:
         fp = open(outFileName)
-    except IOError, err:
+    except IOError as err:
         sys.stderr.write("I/O error: %s\n" % str(err))
         sys.exit(2)
     format = fp.read().split("\n")
@@ -130,7 +130,7 @@
     format[start:end] = lines
     try:
         fp = open(outFileName, 'w')
-    except IOError, err:
+    except IOError as err:
         sys.stderr.write("I/O error: %s\n" % str(err))
         sys.exit(4)
     fp.write("\n".join(format))