Python Engineering Lab

A learning-in-public project. I'm a software engineer consolidating my Python and software-engineering fundamentals by implementing one engineering concept at a time — from scratch, by hand — and writing down what I actually learned.

Each concept lives in its own folder and focuses on one practical pattern at a time, with runnable code, concise documentation, and notes on implementation decisions.

How this lab works

• One concept per folder, numbered in order (01-..., 02-...).
• I write the first version myself before looking at any reference solution. The point is understanding, not copying.
• Each concept folder has its own README with run instructions and notes.

Getting started

You'll need Python 3.12 or newer.

# Clone and enter the repo
git clone https://github.com/ajitagupta/python-engineering-lab.git
cd python-engineering-lab

# Create and activate a virtual environment
python -m venv .venv
.venv\Scripts\activate          # macOS/Linux: source .venv/bin/activate

Then follow the README inside whichever concept folder you want to run — each lists its own dependencies and how to start it.

Roadmap

Concept	Skill	Status	Folder
01 — REST API	Flask routes, HTTP methods, JSON	✅ Done	01-rest-api
02 — Validation & Error Handling	Input validation, status codes	✅ Done	02-validation-error-handling
03 — Pytest API Tests	Testing, test client, fixtures	✅ Done	03-pytest-api-tests
04 — SQLite Persistence	Databases, storage, SQL	✅ Done	04-sqlite-persistence
05 — Search & Filtering	Query parameters, filtering	⬜ Planned	coming soon
06 — Pagination	limit/offset, response metadata	⬜ Planned	coming soon
07 — File Uploads	Multipart uploads, CSV parsing	⬜ Planned	coming soon
08 — Background Tasks	Scheduled jobs, background tasks	⬜ Planned	coming soon
09 — Caching	Cache strategies, invalidation	⬜ Planned	coming soon
10 — Data Parsing & Extraction	Parsing, structured text	⬜ Planned	coming soon

Scoped to ten concepts for now; the back half (architecture, performance, production) gets planned once the pace settles.

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A learning project, updated as I work through it. Progress over speed — one concept genuinely understood beats five rushed.