055-higher-lower/docs/wiki/Lecture-4-Decorators.md

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Lecture 4: Decorators

Code: src/higher_lower/presentation/lectures/step_04_decorators.py.

What we gained

• A decorator is a function that takes a function and returns a new function.
• make_bold, make_emphasis and make_underlined add <b>, <em> and <u> once, so no route repeats the tags.
• Decorators stack: the one nearest the function runs first.
• functools.wraps keeps the name of the function, which Flask needs for every route.