Learn how to instrument Python applications and collect real-time metrics using Prometheus. Explore the advantages of metrics over logging, understand different metric types, and discover best practices for naming and configuration. Dive into the pull-based architecture, metric formats, and aggregation techniques. Gain hands-on experience with dashboards using Grafana, set up alerts, and leverage system insights. Master the art of instrumenting your code and utilize tools like mtail and cat-or.not for comprehensive monitoring. By the end of this talk, acquire the skills to impress colleagues with beautiful graphs and intelligent monitoring in production environments.