no_implicit_optional
A codemod that automatically converts implicit optional type hints in Python code to be PEP 484 compliant.
What is no_implicit_optional?
no_implicit_optional is a Python codemod tool that automatically fixes implicit optional type hints in code to comply with PEP 484 standards. It converts arguments with default values of `None` from implicit forms (e.g., `x: int = None`) to explicit ones like `Optional[int] = None` or `int | None = None`. This helps developers adapt to stricter type checking enforced by tools like mypy and pyright.
Python developers using type hints and static type checkers like mypy or pyright, especially those transitioning to `--strict` mode or updating legacy codebases.
It automates a tedious and error-prone refactoring task, saving time and ensuring consistency across codebases. The tool supports modern Python syntax (PEP 604) and integrates easily into existing workflows.
Overview
A codemod to make your implicit optional type hints PEP 484 compliant.
Use Cases
Best For
- Automatically updating legacy Python code to meet PEP 484 type hint standards
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