Python

Starting with the fundamental distinction between concurrency and parallelism, this guide systematically explains when to use Python’s GIL, threading, multiprocessing, asyncio, and concurrent.futures, how they work together, and how to choose among them.

Using the metaphor of a restaurant kitchen with a single-threaded event loop, this guide systematically explains the complete correspondence among synchronous iteration, generators, coroutines, asynchronous generators, and thread-pool bridging in Python.