Python for SDETs

This course turns Python basics into a real test-automation skill set. You’ll write genuine tests — REST API tests with requests, UI tests with Playwright — run them with pytest, and wire them into CI, all against a real web app you run on your own machine.

It’s free, in English and Azerbaijani, and built for the people moving into automation: aspiring and junior SDETs, and manual testers taking the step to code. It’s the advanced half of this site’s Python track and the Python-language sibling of the JavaScript Playwright course — same skills, same practice app, different language.

Prefer Azerbaijani? Read this course in Azerbaijani →

The promise

By the end you can write real Python tests — API and UI — against a real app, with pytest and CI. Not toy snippets: a structured suite you could show in an interview or drop into a job.

Prerequisites

• Python basics — variables, if, loops, functions, lists/dicts. New to Python? Start with Python Fundamentals (free, runs in your browser) and come back.
• Comfort in the terminal — running commands, cd, installing packages. The Command line & npm reference covers the essentials.
• No prior pytest, requests, or Playwright experience needed — we build each from zero.

How the course works: Learn → Build

Unlike Python Fundamentals, which runs in your browser, this course uses a real local setup — you install Python, pytest, and the libraries, and run tests from your terminal, exactly like on the job.

• Learn — each module introduces a concept with explanations and runnable examples.
• Build — you apply it to TestMarket Lab, a real web app (login, products, cart, checkout, admin) you clone and run locally with npm install && npm start.

TestMarket Lab — your training ground

TestMarket Lab is a small but realistic shop with two surfaces you’ll test:

• A REST API under /api — auth, products, orders, users, cart, plus a reset endpoint built for test setup/teardown. Perfect for the requests modules.
• A web UI with data-testid hooks throughout — perfect for the Playwright modules.

It’s the same app the JavaScript course tests, so if you ever work across both languages, the endpoints and selectors carry over.

New to APIs, HTTP, or status codes?

The Reference section has short primers on APIs, HTTP request/response, and status codes that ground the vocabulary used throughout the API modules.

Module plan

#	Title	Status
0	Setup & first test	Available
1	pytest fundamentals	Available
2	Fixtures & parametrize	Available
3	API testing with requests	Available
4	Negative & validation testing	Available
5	Test data setup & teardown	Available
6	UI automation — Playwright for Python	Available
7	Page Object Model in Python	Available
8	Data-driven tests	Available
9	Reporting & suite structure	Available
10	CI with GitHub Actions	Available
11	Capstone — full API + UI suite	Available
12	Database verification	Available

All twelve modules are live. Module 12 is a senior extension you can bolt onto the capstone: verifying the persisted side effect of an action, not just the response.

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Ready? Start with Module 0 →

Just need the basics first? Begin with Python Fundamentals →.