From 00528e8fec37bdf203bdb172ec3363353268d908 Mon Sep 17 00:00:00 2001
From: R David Murray <rdmurray@bitdance.com>
Date: Sat, 21 Jul 2012 22:48:35 -0400
Subject: #13922: argparse no longer incorrectly strips '--' after the first
 one.

Patch by Jeff Knupp.
---
 Lib/argparse.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'Lib/argparse.py')

diff --git a/Lib/argparse.py b/Lib/argparse.py
index 25803b3519..0ee8c0865e 100644
--- a/Lib/argparse.py
+++ b/Lib/argparse.py
@@ -2186,9 +2186,12 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
     # Value conversion methods
     # ========================
     def _get_values(self, action, arg_strings):
-        # for everything but PARSER args, strip out '--'
+        # for everything but PARSER, REMAINDER args, strip out first '--'
         if action.nargs not in [PARSER, REMAINDER]:
-            arg_strings = [s for s in arg_strings if s != '--']
+            try:
+                arg_strings.remove('--')
+            except ValueError:
+                pass
 
         # optional argument produces a default when not present
         if not arg_strings and action.nargs == OPTIONAL:
-- 
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