What are decorators in Python and how are they used in libraries?

What are decorators in Python and how are they used in libraries?

Decorators in Python are functions that modify the behavior of another function. They are often used in libraries to add functionality like logging, access control, or caching.

Can you give me an example of a decorator used in a popular Python library?

Sure! In Flask, a popular web framework, the @app.route decorator is used to define routes for web applications.

How do I create my own decorator?

To create a decorator, define a function that takes another function as an argument, and then define a nested function that adds the desired behavior.

What are some common use cases for decorators?

Common use cases include logging function calls, enforcing access control, memoization for caching results, and modifying input or output.