Phase 6 — Real-World Python

Chapters 48, 49, 50: Build

Your role: Practitioner — "I can specify and verify production-grade Python features"

In Part 2, you directed Claude Code to handle file operations and build a database-backed project. Phase 6 teaches you to write and own the typed Python code underneath — file processing, PostgreSQL persistence, modular project architecture, and efficient data transformation patterns. Instead of prompting Claude Code and trusting the output, you specify typed interfaces, write tests for edge cases, and verify every layer yourself.

#	Chapter	Key Focus
48	Files, Data Processing, and PostgreSQL	Persistence and data pipelines
49	Modules and Packages	Organizing code for real projects
50	Comprehensions, Generators, and Functional Patterns	Efficient data transformation