This course helps learners transform scattered AI preprocessing code into clean, reusable, and testable Python utilities that meet modern MLOps expectations. Across two focused lessons, learners explore advanced programming constructs—such as generators, decorators, and structured logging—that make ML workflows modular and maintainable. They then apply software-engineering principles to design standards-compliant Python packages that integrate smoothly into real AI pipelines. Through videos, readings, hands-on exercises, and a guided Coursera Lab, learners practice refactoring preprocessing steps, structuring packages using current Python packaging standards, managing dependencies, and writing unit tests with pytest. By the end of the course, learners will have the skills to build and test a functional Python package suitable for internal PyPI publishing and production-ready machine learning work.