Python Testing with pytest
The definitive guide to pytest by Brian Okken — covers fixtures, parametrize, plugins, and test organisation for writing effective, maintainable test suites
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Architecture Patterns with Python
Free online book on applying DDD, ports and adapters, and event-driven architecture in Python — by the authors of the famous "Cosmic Python"
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Effective Python
125 specific ways to write better Python — covers Pythonic thinking, functions, classes, concurrency, and robustness
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High Performance Python
Practical guide to profiling, optimising, and scaling Python code — covers NumPy, Cython, asyncio, multiprocessing, and memory management in depth
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