From efb18d9dceb71673395467609d80060b423dd643 Mon Sep 17 00:00:00 2001
From: Romain Bignon <romain@symlink.me>
Date: Tue, 3 Apr 2012 22:40:02 +0200
Subject: [PATCH] add a method copy()

---
 weboob/capabilities/base.py | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/weboob/capabilities/base.py b/weboob/capabilities/base.py
index ae42f161..0678a83b 100644
--- a/weboob/capabilities/base.py
+++ b/weboob/capabilities/base.py
@@ -21,7 +21,7 @@
 import warnings
 import datetime
 from decimal import Decimal
-from copy import deepcopy
+from copy import deepcopy, copy
 
 from weboob.tools.misc import to_unicode
 from weboob.tools.ordereddict import OrderedDict
@@ -295,6 +295,11 @@ class CapBaseObject(object):
                 return False
         return True
 
+    def copy(self):
+        obj = copy(self)
+        obj._fields = copy(self._fields)
+        return obj
+
     def set_empty_fields(self, value, excepts=()):
         """
         Set the same value on all empty fields.
@@ -315,7 +320,8 @@ class CapBaseObject(object):
         :rtype: iter[(key, value)]
         """
 
-        yield 'id', self.id
+        if hasattr(self, 'id'):
+            yield 'id', self.id
         for name, field in self._fields.iteritems():
             yield name, field.value
 
@@ -358,3 +364,9 @@ class CapBaseObject(object):
                     'Value for "%s" needs to be of type %r, not %r' % (
                         name, attr.types, type(value)))
             attr.value = value
+
+    def __delattr__(self, name):
+        try:
+            self._fields.pop(name)
+        except KeyError:
+            object.__delattr__(self, name)