mypy

Python static type checking validates type hints to catch type errors before runtime. You can enforce this by installing a checker, adding PEP 484 type hints to your code, and running it against your modules to identify mismatches.

Incremental typing allows you to introduce type safety gradually into a large Python codebase. You can add type hints module by module, use incremental checking to validate only changed files, and enable stricter rules progressively via configuration.

Mypy static type checking integrates with FastAPI and Django to provide type-safe web applications. It validates type hints within these frameworks to catch type errors during development and can be enforced in CI/CD pipelines during automated builds.

Strict mode for maximum type safety is configured by creating a mypy.ini or pyproject.toml file in your project. You can enable the --strict flag in your configuration or command line to enforce the highest level of type checking rules.

Static type checking with protocols and structural typing requires Python 3.11 or higher. This version provides the necessary typing features and performance improvements for validating flexible, typed interfaces in your codebase.

Type safety can be enforced in CI/CD pipelines for general Python codebases by integrating static type checking into automated builds. This ensures type errors are caught before deployment, supporting collaboration across teams and safe refactoring.