Mypy is a static type checker for Python.
Type checkers help ensure that you’re using variables and functions in your code correctly. With mypy, add type hints (PEP 484) to your Python programs, and mypy will warn you when you use those types incorrectly.
Python is a dynamic language, so usually you’ll only see errors in your code when you attempt to run it. Mypy is a static checker, so it finds bugs in your programs without even running them.
Mypy is designed with gradual typing in mind. This means you can add type hints to your code base slowly and that you can always fall back to dynamic typing when static typing is not convenient.
Mypy has a powerful and easy-to-use type system, supporting features such as type inference, generics, callable types, tuple types, union types, structural subtyping and more. Using mypy will make your programs easier to understand, debug, and maintain.
This is free and open source software.
Website: github.com/python/mypy
Support:
Developer: Jukka Lehtosalo and contributors
License: MIT License
mypy is written in Python. Learn Python with our recommended free books and free tutorials.
Related Software
| Python Linters | |
|---|---|
| Ruff | Extremely fast Python linter and code formatter |
| ty | Fast Python type checker |
| Mypy | Static type checker for Python |
| Bandit | Find security issues in Python code |
| Pylint | Static code analyser |
| wemake-python-styleguide | Flake8 plugin |
| pycodestyle | Check Python code against style conventions in PEP 8 |
| Pyflakes | Checks Python source files for errors |
| Vulture | Find dead code |
| Pyrefly | Fast type checker and language server |
| Flake8 | Wrapper around PyFlakes and pycodestyle |
| Beartype | Near-real-time hybrid runtime-static type-checker |
| Radon | Computes various metrics from Python code |
| Pyright | Full-featured, standards-compliant static type checker |
| cython-lint | Lint Cython files |
| basedpyright | Fork of pyright |
| Refurb | Modernize Python codebases |
| Pylama | Code audit tool for Python |
| Prospector | Brings together the functionality of other Python analysis tools |
| deptry | Check for dependency issues |
| Fixit | Highly configurable linting framework |
| Pyroma | Rates how well a Python project compiles |
| pydoclint | Python docstring linter |
| YALA | Yet Another Linter Aggregator |
Read our verdict in the software roundup.
 Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |