diff -r d1aa8a9eba44 Lib/argparse.py
--- a/Lib/argparse.py	Wed May 01 14:13:05 2013 +0300
+++ b/Lib/argparse.py	Sat May 11 06:23:31 2013 -0400
@@ -205,8 +205,6 @@
             if self.parent is not None:
                 self.formatter._indent()
             join = self.formatter._join_parts
-            for func, args in self.items:
-                func(*args)
             item_help = join([func(*args) for func, args in self.items])
             if self.parent is not None:
                 self.formatter._dedent()
diff -r d1aa8a9eba44 Misc/ACKS
--- a/Misc/ACKS	Wed May 01 14:13:05 2013 +0300
+++ b/Misc/ACKS	Sat May 11 06:23:31 2013 -0400
@@ -169,6 +169,7 @@
 Mitch Chapman
 Greg Chapman
 Brad Chapman
+Yogesh Chaudhari
 David Chaum
 Nicolas Chauvat
 Michael Chermside
diff -r d1aa8a9eba44 Misc/NEWS
--- a/Misc/NEWS	Wed May 01 14:13:05 2013 +0300
+++ b/Misc/NEWS	Sat May 11 06:23:31 2013 -0400
@@ -31,6 +31,8 @@
 Library
 -------
 
+- Issue #17940 Remove extra code in argparse.py
+
 - Issue #17192: Restore the patch for Issue #10309 which was ommitted
   in 2.7.4 when updating the bundled version of libffi used by ctypes.