The original title is "Stop Editing Working Code: Understanding the Open/Closed Principle in Python"

Short summary

A tutorial on applying the Open/Closed Principle (OCP) in Python, showing how to avoid modifying tested code when adding new features. It walks through duck-typing exporters, first-class functions, decorator-based registries, and functools.singledispatch as alternatives to inheritance-heavy OCP implementations. The examples are clear but basic, covering well-trodden ground in Python design patterns.

• •Demonstrates OCP via duck typing, first-class functions, decorator registries, and singledispatch
• •Code examples show how to add new export formats without modifying existing tested code
• •Content is a standard Python design-pattern tutorial with no AI relevance

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