How to access a containing objects properties from an object inside.

[nuwandame]

Aaron Brady wrote:
> On Mar 5, 8:44 am, nuwandame <nuwand... at 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.