File I/O & JSON/CSV Handling

Summary

Reading and writing files, plus parsing JSON and CSV — the everyday format of datasets, configs and API responses in AI work.

• 1Practice reading/writing CSV with the `csv` module and JSON with the `json` module.
• 2Learn to handle encoding issues and malformed rows gracefully.
• 3Load a real dataset file end-to-end into a usable Python structure.