functions — and the most-hallucinated bug ai ships9 / 9

closures and the @ symbol — what ai is doing when it stacks decorators

Checkpoint

One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.

Final drill. Build a decorator factory called prefixed that takes a string and returns a decorator. The decorator wraps a function so its return value gets the prefix prepended.

Use it like this:

@prefixed("[INFO] ")
def msg():
    return "started"

print(msg())     # [INFO] started

Expected output:

[INFO] started

⌘↵ runs the editor.

Booting Python…

Output

[promptdojo:~]$ _