What are the best practices for using scope in Python?

What are the best practices for using scope in Python?

When using scope in Python, it's important to understand the LEGB rule: Local, Enclosing, Global, and Built-in scopes. Always prefer local variables over global ones to avoid unintended side effects.

Can you explain the LEGB rule in more detail?

Sure! The LEGB rule defines the order in which Python looks for variable names. It first checks Local scope, then Enclosing scope (like nested functions), followed by Global scope, and finally Built-in scope, which includes built-in functions and exceptions.

What are some common mistakes to avoid with variable scope?

Common mistakes include using global variables unnecessarily, which can lead to code that is hard to debug, and shadowing variables by using the same name in different scopes.

How can I manage variable scope in large projects?

In large projects, it's best to use classes and functions to encapsulate variables, keeping them local to the function or method where they're needed. This reduces the risk of conflicts and makes your code more modular.