Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from http://mypy-lang.org/ below:

Optional Static Typing for Python

Why mypy?

Compile-time type checking

Static typing makes it easier to find bugs with less debugging.

Easier maintenance

Type declarations act as machine-checked documentation. Static typing makes your code easier to understand and easier to modify without introducing bugs.

Grow your programs from dynamic to static typing

You can develop programs with dynamic typing and add static typing after your code has matured, or migrate existing Python code to static typing.

Mypy is an optional static type checker for Python that aims to combine the benefits of dynamic (or "duck") typing and static typing. Mypy combines the expressive power and convenience of Python with a powerful type system and compile-time type checking. Mypy type checks standard Python programs; run them using any Python VM with basically no runtime overhead.

Mypy 1.15 released

5 Feb 2025: Mypy 1.15 was released. Read the blog post for the details. -Wesley Collin Wright

Mypy 1.14 released

20 Dec 2024: Mypy 1.14 was released. Read the blog post for the details. -Valentin Stanciu

Mypy 1.13 released

22 Oct 2024: Mypy 1.13 was released. Read the blog post for the details. -Shantanu and Jukka Lehtosalo

Mypy 1.12 released

14 Oct 2024: Mypy 1.12 was released. Read the blog post for the details. -Jukka Lehtosalo

Older news

def fib(n):
    a, b = 0, 1
    while a < n:
        yield a
        a, b = b, a+b

def fib(n: int) -> Iterator[int]:
    a, b = 0, 1
    while a < n:
        yield a
        a, b = b, a+b

Migrate existing code to static typing, a function at a time. You can freely mix static and dynamic typing within a program, within a module or within an expression. No need to give up dynamic typing — use static typing when it makes sense. Often just adding function signatures gives you statically typed code. Mypy can infer the types of other variables.

Mypy type checks programs that have type annotations conforming to PEP 484. Getting started is easy if you know Python. The aim is to support almost all Python language constructs in mypy.

Mypy has a powerful, modern type system with features such as bidirectional type inference, generics, callable types, abstract base classes, multiple inheritance and tuple types.

Many commonly used libraries have stubs (statically typed interface definitions) that allow mypy to check that your code uses the libraries correctly.

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4