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Python Production Debugging — Senior

Debug production as a system:

flowchart LR Symptom[alert or user report] --> Evidence[logs, metrics, traces] Evidence --> Hypothesis[one testable cause] Hypothesis --> Mitigation[reduce impact] Mitigation --> Fix[verified change] Fix --> Learning[runbook or guardrail]

Prioritize mitigation and blast-radius control. Use profiles, thread/task dumps, and database evidence only when the symptom points there. Record the invariant that the fix restores.