Explain LEGB in Python | Dataford Interview Questions

Explain the LEGB (Local, Enclosing, Global, Built-in) rule in Python with a clear example.

Implement demonstrate_legb(items) to return a dictionary showing one value resolved from each LEGB scope. Use a nested function, a module-level variable, and the built-in len function.

The function accepts a list and returns a dictionary with keys local, enclosing, global, and built_in.

Constraints

items is a list.
The list may be empty.
Return exactly the keys local, enclosing, global, and built_in.
The values for local, enclosing, and global must identify their corresponding scopes.

Function Signature

def demonstrate_legb(items):

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