PySnooper is a debugging library that automatically logs variable assignments and changes throughout your code execution, providing detailed insights into program flow without manual print statements. Instead of adding debug prints or using a traditional debugger, you can simply decorate functions with PySnooper to see exactly what's happening at each line of code. It's useful for understanding complex logic, tracking down bugs in production-like environments, or learning how unfamiliar code works.

32 open issues · last updated Jul 21, 2026