What is variable scope, and how did we manage without it before? This topic is essential for understanding the following subjects: Closures and Decorators. I assure you that this topic will be both enjoyable and practical. You will gain knowledge about local, nonlocal, and global variables.

Global Variable

Local Variable

Challenge: Modifying a Global Variable

Nested Functions

Nonlocal Variable

Closures

Challenge: Threshold Checker

5. Decorators

This section provides an in-depth exploration of Python decorators, a powerful feature that allows for the modification and enhancement of function behavior. Participants will learn how to write their own decorators, understand built-in decorators, and apply decorators in practical scenarios.

Introduction to Decorators

Syntax

Challenge: Create Your Decorator

Decorators with Parameters

Chaining Decorators

Challenge: Basic Smores Recipe

Practical Examples of Decorator Usage

Nonlocal Variable

So, now we understand the difference between global and local variables and have learned about nested functions. The nonlocal variable is used in nested functions. Let's look at an example:

Just as with global variables, we cannot change the variable created in outer_function inside inner_function without using the special keyword nonlocal.

The output is:

Everything was clear?

Section 4. Chapter 5

Course Content

Intermediate Python: Arguments, Scopes and Decorators

Nonlocal Variable

Just as with global variables, we cannot change the variable created in outer_function inside inner_function without using the special keyword nonlocal.

The output is:

Everything was clear?

Section 4. Chapter 5