Evolving Python's Type System

This chapter explores the interconnectedness of coding tools like linters and type checkers, with a particular focus on the Salsa tool's performance and caching functionalities. It discusses the evolution of Python's type system, including the role of Python Enhancement Proposals (PEPs) and the challenges of introducing new features while maintaining simplicity. Additionally, the chapter delves into the practical applications of type annotations at runtime, emphasizing their significance in modern frameworks such as FastAPI.