Simple Clean Python Project Needed

I want a small yet fully-functioning Python 3 project built from scratch. The focus is on clarity and sound structure: every module should be logically organised, well-commented, and accompanied by concise docstrings so another developer can follow the flow in minutes.

I do not have a fixed problem domain in mind—I’m happy to let you propose something lightweight (for example a tiny automation tool, data parser, or similar) as long as it runs without errors, illustrates good coding practice, and avoids unnecessary complexity or bloated dependencies. If you feel a third-party package is truly useful, add it to a requirements.txt and explain the choice in your README.

Deliverables:
• Complete, runnable source code (Python 3.10+ compatible)
• A short README that explains setup, purpose, and a quick demo command
• Any auxiliary files (tests, sample data, requirements.txt) needed to show the project works end-to-end

Ship the project in a single zipped folder or a Git repository link. Once I can install the requirements, run the demo, and see clean output with no errors or linter warnings, the task is done.