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# Advancing Python typing **Published:** March 2, 2026 | **Authors:** Yury Selivanov, Michael J\. Sullivan --- We’re excited to share a year-long research effort aimed at making Python’s type system more expressive and composable, something closer in spirit to the programmable types in TypeScript, but carefully crafted for Python’s runtime model. The result is PEP 827: Type Manipulation. Python’s runtime is incredibly powerful: classes, methods, and even whole APIs can be generated on the...