From d40cad57e3da1424bbb2a5323004adf1f4fb3677 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Sun, 31 May 2009 15:13:32 -0400
Subject: [PATCH] Record.copy(): deal with defined, but unavailable fields.

---
 pytools/__init__.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pytools/__init__.py b/pytools/__init__.py
index 5f5a8ef..b372dd2 100644
--- a/pytools/__init__.py
+++ b/pytools/__init__.py
@@ -73,7 +73,10 @@ class Record(object):
     def copy(self, **kwargs):
         for f in self.__class__.fields:
             if f not in kwargs:
-                kwargs[f] = getattr(self, f)
+                try:
+                    kwargs[f] = getattr(self, f)
+                except AttributeError:
+                    pass
         return self.__class__(**kwargs)
 
     def __getstate__(self):
-- 
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