来自已弃坑的 Hydrogenlib，重拾起当初的决心
[!TIP] 这个项目来自
HydrogenLib的Objective-Struct模块，脱离大项目的版本同时，
HydrogenLib中的Objective-Struct不再会更新
[!TIP] 作者的主要开发精力放在了另一些项目上，也许很长时间这个项目都不会再更新
OBStruct
一个简单、纯粹、极速的二进制解析库
亮点
- 纯 Python
- 基于类型注解的字段声明方式
- 支持
struct标准库中的所有格式，并额外支持 array 类型 - 基于 AOT 的加速
- 完整的操作支持（打包、解包、流式处理）
[!WARNING] 使用
array类型将带来严重的性能损失，谨慎使用
基准测试
系统环境
- 12th Gen Intel® Core(TM) i7-12700H
在 12个字段，10000 次操作，8轮取平均值的条件下：
- 打包：269.639ns 一次操作
- 解包：582.185ns 一次操作
安装
pip install obstruct
如果使用 uv 等包管理器，则按照工具的方法安装即可
用法
首先声明一个 Struct 类型，它是一个 dataclass，也是一个 struct
import obstruct as obs
from dataclasses import dataclass
@obs.struct()
@dataclass()
class MyStruct(obs.Struct):
a: int
b: float
c: obs.long
d: obs.unsigned_short
if __name__ == '__main__':
data = MyStruct(a=0, b=2.0, c=10000, d=14545)
packed_data = data.pack()
print(packed_data)
restored = MyStruct.unpack(packed_data)
print(restored)
print(data == restored)
在上述示例中，你可能发现 data != restored，这是浮点数的精度限制导致的。
因此，我们不建议使用浮点数类型，浮点数在二进制传输中也不常见。
计划
- 展平装饰器，目前的 API 较为繁琐，需要简化为唯一的
Struct基类 - 继续优化性能
- 通过存根文件强制表明类型似乎变得不再有效了
- 支持 Tag 联合类型，对标
msgspec
1 maintainer
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