xlwings Lite: Practice Lab

Learn xlwings Lite by practical examples.

How to Use This Lab

1. Download the Core Rulebook Get the required AI Coder Instructions file. This is the foundational context for the AI.

2. Choose a Practice Kit Select a module below (e.g., Campaign Build) and download the workbooks and guide.

3. Execute & Learn Follow the guide's step-by-step instructions to execute the workflow in your own AI session with the practice workbook. Compare results with the completed workbook, which also has the full working code for the whole module.

4. Starting first time? Watch this video from creator Felix Zumstein covering xlwings Lite installation and quick start tutorial. Watch Tutorial

The Complete xlwings Lite AI Coder Instructions

• This is my personal, 1,855-line rulebook for xlwings Lite that I feed to the AI right at the start of every session.
• It bridges the knowledge gap in modern LLMs about xlwings Lite's specific environment and includes non-negotiable 'Golden Rules', error patterns, proven code snippets, tool limitations, and best practices from my client projects.
• Helps in delivering clean, reliable xlwings Lite code-reducing debugging and iterations.

This file is required for all modules.

For AI

Download the complete markdown file. Upload to your AI at start of every session. Download

For Humans

View the complete guide in your browser with proper formatting and navigation. View in Browser

Practice Kits: Workbooks & Guides

Module-01: Data Manipulation and Visualisation

AI assisted data transformation, intelligent variable creation, automated profiling, and visualization.

• AI-Driven Variable Creation: Natural language instructions to generate insightful derived variables, summary metrics, and ratios.

• Automated Analysis & Charts: Generate profile summary tables and visualizations-including correlation matrices, combo charts, and box plots-from AI instructions.

• AI Coder Best Practices: Guidance on designing effective instructions, refining AI-generated code, and validating the final outputs for accuracy.

• Practice Workbook

• Guide PDF

• Completed Workbook (WithCode)

Module-02: Practical Data Cleaning

A step-by-step guide for using AI to generate, test, and validate a robust data cleaning script.

• AI-Driven Rule Generation: Having AI analyze data patterns, generate initial cleaning rules, and identify potential edge cases and exceptions.

• AI Test Case Creation: Using AI to generate outlier scenarios and difficult edge cases to stress-test the robustness of your cleaning script before deployment.

• Auditing AI: Reviewing AI's proposed logic, identifying what it missed and validating the results.

• Practice Workbook

• Guide PDF

• Completed Workbook (WithCode)

Module-03: Campaign Build

A step-by-step guide for working with AI to execute a full, auditable campaign workflow in xlwings Lite.

• Exclusions & Audits: Build and verify a sequential exclusion waterfall to create a clean, eligible population.

• Segment & Prioritize: Apply rule-based logic to segment the eligible list into actionable, prioritized tiers.

• Test/Control Framework: Implement a statistically sound sampling process to create reliable Test and Control groups for performance measurement.

• Practice Workbook

• Guide PDF

• Completed Workbook (WithCode)

Explore Live Apps

Web Scraper

Transform Excel into a powerful web scraping platform using Jina AI and Google Gemini.

• Uses Jina AI API for webpage rendering to markdown
• Google Gemini analyzes content for intelligent data extraction
• Process batches of URLs with custom column specifications Open

Technical Analysis

Create professional technical analysis reports with AI-powered chart pattern recognition.

• Pulls live data from Yahoo Finance via custom FastAPI server
• Gemini Vision API analyzes charts for technical patterns
• Generates PDF/HTML reports with embedded charts and tables Open

Database & ML

Connect to any database with custom FastAPI layer for data analysis and machine learning.

• Connects to PostgreSQL/MySQL via web API layer
• Pull random records, run custom queries, explore data
• Build XGBoost models with evaluation and decile tables Open

AI Workflows

Automate Excel workflows with AI schema detection using Gemini 2.0-Flash or GPT-4o.

• Automatic schema detection with structured JSON output
• Identify categorical and numerical variables intelligently
• Generate SQL-compatible data types for database integration Open

Community and Official Resources

• xlwings Lite: Official xlwings Lite website with installation instructions and examples.
• xlwings Documentation: Comprehensive documentation with Excel object reference and API documentation.
• Run Python in Excel for FREE: Practical automation tutorial by Sven B (Coding is Fun).

Created by Felix Zumstein, xlwings Lite delivers a powerful and flexible solution for integrating Python with Excel - enabling native Excel support for databases, AI agents, LLMs, advanced analytics, machine learning, APIs, web services, and complete automation workflows.