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PyTraits

Introduction

PyTraits is a Python library that provides functionality similar to Rust traits. It allows you to define protocols using impl or trait annotations to specify the behavior that classes should implement.

Installation

You can install PyTraits using pip:

pip install pytraits

Usage

使用 PyTraits，首先需要使用 trait 注解定义一个协议：

from typing import runtime_checkable

@runtime_checkable
class Printable:
    def print(self):
        pass

然后，可以使用impl或trait装饰器为已定义的类实现该协议：

from pytraits import impl, trait


class MyClass1: pass


@impl(Printable)
class MyClassImplPrintable(MyClass1):
    def print(self):
        print("从 MyClass 打印")


class MyClass2: pass


@trait
class MyClassTraitPrintable(MyClass2, Printable):
    def print(self):
        print("从 MyClass2 打印")


mc1: MyClass1 | Printable = MyClass1()
mc2: MyClass2 | Printable = MyClass2()
mc1.print()
mc2.print()

现在，MyClass 实现了 Printable 协议，可以相应地使用。

Contributing

Contributions are welcome! If you find any issues or have suggestions for improvement, please open an issue or submit a pull request on GitHub.

License

This project is licensed under the MIT License - see the LICENSE file for details.

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