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She curled up with her laptop and started reading. Chapter 3 showed her how to use aws_xray_sdk to trace performance. Chapter 5 had a pattern for idempotent DynamoDB updates using conditional expressions. By midnight, she’d rewritten the core logic.
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The function was 2,000 lines of tangled Python: retry logic that didn’t retry, hardcoded S3 bucket names, and a DynamoDB query that scanned the whole table every time. “Fix it by Friday,” the CTO said. She curled up with her laptop and started reading
