[Python-3000] Can a Python object move in memory?

["Martin v. Löwis"]

> I keep Py_UNICODE* pointers into this PyUnicodeObject in my iterator 
> object, and I access these pointers on subsequent calls to my next() 
> method.  Is this an error?  The more I think about it the more convinced 
> I am it's an error.

Because the pointer may change? There is a (silent) promise that for
a given PyUnicodeObject, the Py_UNICODE* will never change.

Regards,
Martin