Real Python: The LEGB Rule & Understanding Python Scope
The concept ofscoperules howvariablesand names are looked up in your code. It determines the visibility of a variable within the code. The scope of a name or variable depends on the place in your code where you create that variable. The Python scope concept is generally presented using a rule known as theLEGB rule.
The letters in the acronym LEGB stand forLocal, Enclosing, Global, and Built-inscopes. This summarizes not only the Python scope levels but also the sequence of steps that Python follows when resolving names in a program.
In this video course, you’ll learn:
- Whatscopesare and how they work in Python
- Why it’s important to know aboutPython scope
- What theLEGB ruleis and how Python uses it to resolve names
- How to modify thestandard behaviorof Python scope using
globalandnonlocal - Whatscope-related toolsPython offers and how you can use them
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