# 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:

```bash
pip install pytraits
```

## Usage


使用 PyTraits，首先需要使用 `trait` 注解定义一个协议：

```python
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：

```python
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](LICENSE) file for details.