On Wed, 28 Jan 2009 11:06:21 -0800, Reckoner wrote:
> thanks for your reply.
>
> For the second case where
>
>> class TaintThing(object):
>> parent = A
>> def __init__(self, obj):
>> self.__dict__['_proxy'] = obj
>> def __getattr__(self, attr):
>> return getattr(self._proxy, attr)
>> def __setattr__(self, attr, value):
>> setattr(self._proxy, attr, value)
>> self.parent.taint()
>
> you have told it that parent is 'A'. Shouldn't that be passed to it
> somehow in the following:
>
>> # untested
>> class TaintList(list):
>> def append(self, obj):
>> list.append(self, TaintThing(obj))
>> # similar for __setitem__, extend, insert
Sure. Just change the initialisation of TaintThing to something like this:
#untested
def __init__(self, obj, parent):
self.__dict__['_proxy'] = obj
self.parent = parent
and then TaintList to something like this:
def append(self, obj):
list.append(self, TaintThing(obj, self))
# similar for __setitem__, extend, insert
--
Steven
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