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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