From Python Concurrency with asyncio by Matthew Fowler

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Python is flexible, versatile, and easy to learn. It can also be very slow compared to lower-level languages.¬†Python Concurrency with asyncio¬†teaches you how to boost Python’s performance by applying a variety of concurrency techniques. You’ll learn how the complex-but-powerful asyncio library can achieve concurrency with just a single thread and use asyncio’s APIs to run multiple web requests and database queries simultaneously. The book covers using asyncio with the entire Python concurrency landscape, including multiprocessing and multithreading.