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#нововведение

PEP 695 был принят! 🚨

PEP 695

В ближайщее время произойдут значительные изменения в синтаксе тайпваров и дженериков.
Вот как сейчас мы создаём generic type alias:

from typing import TypeAlias

_T = TypeVar("_T")

ListOrSet: TypeAlias = list[_T] | set[_T]

Теперь с утверждением данного пепа, это будет выглядить так:

type ListOrSet[T] = list[T] | set[T]

Кроме того синтаксис использования дженериков в классах также упростили.
Теперь он выглядить так:

class ClassA[T: str]:
    def method1(self) -> T:
        ...

Где T - TypeVar.

Подробнее можно почитать об изменения тут.

Что вы думате по поводу подобных изменений? Считаете ли вы введение "var подобных" объявлений, хорошим вектором развития синтаксиса питона? 🤔

Python Enhancement Proposals (PEPs)

PEP 695 – Type Parameter Syntax | peps.python.org

This PEP specifies an improved syntax for specifying type parameters within a generic class, function, or type alias. It also introduces a new statement for declaring type aliases.

www.tg-me.com/in/Python Turbo Уютное сообщество Python разработчиков/com.pythonturboru/402

4.8K viewsApr 23, 2023 at 08:18

tg-me.com/pythonturboru/402

Create: 2023-04-23
Last Update: 2025-06-19 19:54:59

from typing import TypeAlias

_T = TypeVar("_T")

ListOrSet: TypeAlias = list[_T] | set[_T]

Теперь с утверждением данного пепа, это будет выглядить так:

type ListOrSet[T] = list[T] | set[T]

Кроме того синтаксис использования дженериков в классах также упростили.
Теперь он выглядить так:

class ClassA[T: str]:
    def method1(self) -> T:
        ...

BY Python Turbo. Уютное сообщество Python разработчиков.

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