What is scope chaining in Python?
An example of an AI chatbot conversation about scope chaining in Python.
What is scope chaining in Python?
Scope chaining in Python refers to the way Python resolves variable names. It looks for a variable in the local scope first, then in the enclosing scopes, and finally in the global scope.
Can you give me an example of scope chaining?
Sure! If you have a variable defined in a function, and that function is nested within another function, Python will first look for the variable in the innermost function's scope, then in the outer function's scope, and finally in the global scope.
What happens if a variable is not found in any scope?
If a variable is not found in any of the scopes, Python will raise a NameError, indicating that the variable is not defined.
How does this differ from other programming languages?
In many languages, scope resolution can differ. For example, some languages may not have nested scopes or may use different rules for variable resolution.
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