How do I get the return value when using Python exec on the code object of a function?

Question

For testing purposes I want to directly execute a function defined inside of another function.

I can get to the code object of the child function, through the code (

Answer 1

Here's a way to return a value from exec'd code:

def exec_and_return(expression):
    exec(f"""locals()['temp'] = {expression}""")
    return locals()['temp']

I'd advise you to give an example of the problem you're trying to solve. Because I would only ever use this as a last resort.