Pyre

Pyre is a performant static type checker for Python developed by Meta (formerly Facebook). It analyzes Python code to detect type errors, enforce type safety, and improve code reliability without requiring runtime execution. It integrates with the Python ecosystem to provide fast, incremental type checking for large codebases.

Also known as: Pyre Check, Pyre Type Checker, Meta Pyre, Pyre Static Analysis, Pyre-Tool

Why learn Pyre?

Developers should use Pyre when working on large Python projects where type safety and early error detection are critical, such as in enterprise applications or data-intensive systems. It is particularly valuable for teams adopting gradual typing with Python's type hints (PEP 484) to catch bugs during development, enhance code maintainability, and support refactoring in complex codebases.

Learning Resources

• docs: Pyre Official Documentation
• tutorial: Getting Started with Pyre Tutorial
• docs: Pyre on GitHub Repository
• tutorial: Real Python Article on Type Checkers
• video: PyCon Talk on Static Typing in Python