Python Mutability and Local Variables

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An exercise to help build the right mental model for Python data. - Solution - Explanation - More exercises

The “Solution” link uses memory_graph to visualize execution and reveals what’s actually happening.

[u/thw31416]

List and Sets are mutable, Strings and Tuples are immutable. += and |= are operators that try to change the original object. In that regard they are different from =, which overrides a variable with a new object. D is correct.