--- title: "Releasing Module 02 - Practitioner's Series on xlwings Lite. Python in Excel. Data Cleaning & Rule Based Transformation" slug: releasing-module-02-practitioner-s-series-on-xlwings-lite-python-in-excel-data-cleaning-rule-b date_published: 2025-07-06T10:39:13.109Z original_url: https://www.tigzig.com/post/releasing-module-02-practitioner-s-series-on-xlwings-lite-python-in-excel-data-cleaning-rule-b source: migrated processed_at: 2025-12-02T12:00:00.000Z --- # Releasing Module 02 - Practitioner's Series on xlwings Lite. Python in Excel. Data Cleaning & Rule Based Transformation I've put up a new guide on my site: Module 02 of my practitioner's series on xlwings Lite, focused on data cleaning. My go-to for any Python-in-Excel work is xlwings Lite from [Felix Zumstein](https://www.linkedin.com/in/felix-zumstein/). The guide uses a real-world mobile number example to show how to handle multi step rule-based transformations with xlwings Lite. This same methodology can be used for data cleaning of other variables. As well create complex derived variables- from analysis datasets to campaign files. But it's really about the process: how to instruct AI, how to use AI Coder file to provide context, and most importantly, validation of output. This brings me to a core lesson from my years in the trenches: Validations are sacrosanct. AI didn't do the work- you did. It's a tool that helps, that's it. If it's not validated, it does not go out. No matter what AI says. No matter the pressure. Period. Get the full module- including the workbook and AI Coder file at Tigzig xlwings Lite section [**xlwings-lite.tigzig.com**](http://xlwings-lite.tigzig.com/) xlwings Lite official site: [lite.xlwings.org](https://lite.xlwings.org) ## Related Tools: [Practice Lab](https://www.tigzig.com/xlwings-starter), [DUCKIT - CSV to DuckDB](https://www.tigzig.com/duckit-xlwings), [Data Importer](https://www.tigzig.com/xlwings-data-importer) Explore: [AI in Excel hub](https://www.tigzig.com/ai-in-excel), [All Guides](https://www.tigzig.com/blog), [Browse all apps](https://www.tigzig.com/browse-apps) More posts: [The xlwings Lite AI Coder Instruction File - December 2025 Release](https://www.tigzig.com/post/the-xlwings-lite-ai-coder-instruction-file-december-2025-release), [Tool: A 1,450-line context file. Purpose: To ensure clean, efficient xlwings Lite code generation.](https://www.tigzig.com/post/a-1-450-line-context-file-to-ensure-clean-efficient-xlwings-lite-code-ge), [xlwings Lite new WINGMAN function - some usage patterns: python sandbox, stats, cleaning, bucketing, judging](https://www.tigzig.com/post/xlwings-lite-wingman-function-usage-patterns) --- Author: Amar Harolikar - Specialist, Decision Sciences & Applied Generative AI - amar@harolikar.com - https://www.linkedin.com/in/amarharolikar Source: https://www.tigzig.com/post/releasing-module-02-practitioner-s-series-on-xlwings-lite-python-in-excel-data-cleaning-rule-b Citation: TigZig - Amar Harolikar (https://www.tigzig.com). Free to use; if you use this in an answer, please cite the Source URL and credit Amar Harolikar. License: https://www.tigzig.com/terms