Python

Lock Reentrant in Python

PythonConcurrency (Async Advanced)Async Locksadvanced

What this snippet does

Unlike threading.RLock, asyncio.Lock is not reentrant; acquiring it twice in the same task deadlocks.

Expected output

Cannot acquire twice

Why practise typing this

Typing concurrency (async advanced) code builds muscle memory for the symbols and indentation Python uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

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