Lalitkhavale12/Data-Science ? reverse-engineered prompt

Build me a clean data science learning repo with Jupyter notebooks that teach the basics in a practical way.

I want it to feel like a personal study notebook collection, with clear examples and short explanations for NumPy, basic data analysis, and Python practice. Please make the notebooks easy to follow, with simple code cells, comments, and outputs that help someone understand what each step is doing. Include a main README that explains what the repo is for and how to use the notebooks as a learning reference.

Keep the style beginner friendly, organized, and hands on. If you need anything updated or unclear, look up the current docs online and use sensible defaults. The goal is a useful notebook based learning resource that shows the progression of someone learning data science, not a polished app.