On Mar 5, 9:51 am, nuwandame <nuwand...@hotmail.com> wrote: > Aaron Brady wrote: > > On Mar 5, 8:44 am, nuwandame <nuwand...@hotmail.com> wrote: > >> I have two objects obj1 and obj2. Inside obj1 there is an attribute for > >> success (obj1.success) and for containing other objects (obj1.data) > > >> I am using setattr() to add obj2 as an attribute to obj1.data > >> (obj1.data.obj2) this is working fine. > > >> My problem is when someone changes a variable in obj2 instance after it > >> is added to obj1 e.g. > > >> obj1.data.obj2.success = False > > >> I am trying to figure out how to locate and access obj1.success when > >> obj2.success has changed. > > >> Any assistance, pointers, ideas are much appreciated. > > >> JJ > > > Hi. There's no way in general, but if you will make a few > > assumptions, there are some possibilities. For example, you could > > make 'obj1.success' a descriptor, which searches its '__dict__', and > > looks for 'success' attributes in its contents. > > > How does that strike you? > > You suggest an interesting idea which triggered another idea... > > Are there mechanisms for using, accessing, executing the object id? > > objid = id(obj1) > > If so, I could set that as an attribute in the subsequent object when > adding it as an attribute and then call it when values of that attribute > changed.
I think what you are after is a weak value dictionary. But why not just store the parent as an attribute? obj2.parent= obj1. -- http://mail.python.org/mailman/listinfo/python-list