055-higher-lower/docs/wiki/Lecture-5-Advanced-Decorators.md

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Lecture 5: Advanced decorators

Code: src/higher_lower/presentation/lectures/step_05_authenticated.py.

What we gained

• *args collects positional arguments and **kwargs collects keyword arguments, so a decorator works for any function.
• is_authenticated reads the user from the arguments and runs the function only when user.is_logged_in is true.
• A decorator can control whether a function runs at all, not only change its result.
• The same pattern protects any function that needs a logged-in user.