# 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

To use PyTraits, first, you need to define a protocol using the `runtime_checkable` annotation:

```python
from typing import runtime_checkable


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

Then, you can use the `impl` annotation to implement the protocol for a class:


```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()
```

Now, `MyClass` implements the `Printable` protocol and can be used accordingly.


## 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.