I am working with an object, Context, that maintains an identity map by using the weakref.WeakValueDictionary. I would like to clone this Context object (and objects that may have a Context object) using copy.deepcopy(). When I try to do this, the deep copy operation recurses down to the WeakValueDictionary, down to the KeyedRef subclass of ref, and then fails. It seems that copy.copy() and copy.deepcopy() operations on weakrefs just won't work.
The failure can be replicated with this (much simpler) scenario: >>> import weakref, copy >>> class Test(object): pass >>> t = Test() >>> wr = weakref.ref(t) >>> wr_new = copy.copy(wr) # Fails, not enough args to __new__ Anybody out there have some insight into this? Thanks Rick -- http://mail.python.org/mailman/listinfo/python-list
