Observability Patterns

Structured Logging

Python (structlog)

import structlog

logger = structlog.get_logger()

logger.info("user_created", user_id=user.id, email=user.email, source="api")
logger.error("payment_failed", order_id=order.id, error=str(e), amount=amount)

Node.js (Pino)

import pino from "pino";

const logger = pino({ level: "info", transport: { target: "pino-pretty" } });