Async DB Transaction in Python

What this snippet does

Async context managers handle resource lifecycles in event-loop-bound applications safely.

Expected output

Begin
Operation
Commit

Why practise typing this

Typing context managers (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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