How do I 'track' or obtain a raw pointer that is that of a variable?

[jymchng]

Suppose I have a decorator that gets a returned variable from the wrapped function, how do I 'track' that variable using Rust pyo3?

Example

def decorator(wraps: Callable, *args, **kwargs):
    return_value = wraps(*args, **kwargs)

def func(name: str):
    return name

Let's suppose we call the decorator with func and 'Mary'.

decorator(func, 'Mary')

In decorator, the returned value from wraps(*args, **kwargs) is the variable name from func. Is there a way for Rust to track the variable name and always be able to return the value referred to by name, e.g. 'Mary'?

name -> value: 'Mary'

Suppose somewhere down the line, a code like this is executed: decorator(func, 'Jane'), I would want the wrapped struct in Rust to be able to know name referred to value has changed to 'Jane'. How can I achieve this?