What are decorators in Flask and how do I use them?

What are decorators in Flask and how do I use them?

Decorators in Flask are a way to modify or enhance functions, typically used for routing and middleware. They allow you to add functionality to your views without modifying their code directly.

Can you give me an example of a simple decorator?

Sure! A common example is the @app.route decorator, which is used to define a route for a view function. For instance:

@app.route('/hello')
def hello():
    return 'Hello, World!'

How can I create my own custom decorator?

To create a custom decorator, define a function that takes another function as an argument. Here's a simple example:

def my_decorator(f):
    def wrapper():
        print('Something is happening before the function is called.')
        f()
        print('Something is happening after the function is called.')
    return wrapper

@my_decorator
def say_hello():
    print('Hello!')

What are some common use cases for decorators in Flask?

Common use cases include authentication, logging, and modifying request/response objects. They help keep your code clean and organized.