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Async Programming

AdvancedConcurrency

async/await, coroutines, tasks, the event loop, cancellation, task groups, backpressure and graceful shutdown.

24 lessons 6 labs 2 projects ~15h
Prerequisites: Iterators & Generators
0%track

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async / await and the Event Loop

async/await lets a single thread juggle thousands of I/O operations by cooperatively pausing at await points and resuming when results are ready.

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Tasks, gather & Concurrency

Tasks turn coroutines into concurrent work: `create_task`, `gather` and `TaskGroup` schedule many coroutines on one event loop so their I/O waits overlap — the difference between code that takes the sum of its waits and code that takes the longest.

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Why it matters

Interview importance 5/5 · production importance 5/5.

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async / await and the Event Loop

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Python 3 · FastAPI · AsyncIO · Data & AI engineering