Python Scope and the LEGB Rule: Resolving Names in Your Code

The scope of a variable in Python determines where in your code that variable is visible and accessible. Python has four general scope levels: local, enclosing, global, and built-in. When searching for a name, Python goes through these scopes in order. It follows the LEGB rule, which stands for Local, Enclosing, Global, and Built-in.

Understanding how Python manages the scope of variables and names is a fundamental skill for you as a Python developer. It helps you avoid unexpected behavior and errors related to name collisions or referencing the wrong variable.