Decorators and Closures by Example in Python

Decorators and Closures by Example in Python

When writing closures and decorators, you must keep the scope of each function in mind. In Python, functions define scope. Closures have access to the scope of the function that returns them; the decorator’s scope.

Learn how to augment the behavior of a function using a decorator

The code discussed here can be found in this repository.

We’ll begin with a dense description of these concepts. Then move into an elucidating example.

Decoration, Closures and Scope

Decoration is a design pattern that allows you to modify the behavior of a function. A decorator is a function that takes in a function and returns an augmented copy of that function.

When writing closures and decorators, you must keep the scope of each function in mind. In Python, functions define scope. Closures have access to the scope of the function that returns them; the decorator’s scope.

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If you don’t understand this jargon, that's ok. Here's an example to clarify these concepts.

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