Passing parameter to python decorator?

Question

Python

What does @app.route("/") mean? Not what it does, but what it means in python. The only thought is calling a decorator with a parameter, but this is nonsense in my opinion.

app = Flask()

@app.route("/")
def nothing():
    pass

Answer 1

A description and valid syntax for function decorators is given in function-definitions .
On my own, I’ll add that I understand the decorator syntax with brackets as a kind of function of the decorator factory, although this is clearly not written anywhere in the documentation, but such a decorator is implemented in this way.

Answer 2

https://github.com/pallets/flask/blob/2bf477cfeafd...