dlt698 Python
Python 包直接绑定同一提交的 C++17 内核,独立构建不改变 C++ 安装包。版本来自根 VERSION,导入时核对安装 metadata、包装层和原生扩展的构建身份。
开发环境需 CPython 3.11–3.14、C++17 编译器及 CMake。Windows 使用 x64 MSVC Release /MD。
python -m venv .venv
.venv/Scripts/python -m pip install -e ".[dev]"
.venv/Scripts/python -m pytest python/tests
从联合 GitHub Release 下载对应解释器和平台的 wheel 后,使用 python -m pip install 文件名.whl。源码开发也支持上面的 editable 安装;构建后端固定为 scikit-build-core 0.11.6,pybind11 使用仓库内 3.1.0。包没有运行时第三方 Python 依赖。源码包自带内核与需要的第三方头文件,无 Git 也可重建。
from dlt698 import Client, Data, Oad, Server
frequency = Oad(oi=0x200F, attribute=2)
with Server() as server:
server.set(frequency, Data.uint16(5000))
server.start_tcp("127.0.0.1", 0)
with Client() as client:
client.connect_tcp("127.0.0.1", server.local_port)
result = client.get(frequency)
print(result.require_data().as_uint16()) # 原始值 5000,单位/倍率查标准目录
接口层次与阶段
| 入口 | 已实现能力 | 约定 |
|---|---|---|
dlt698.Client / Server |
TCP、简单/完整参数串口、普通/列表 GET、SET、ACTION、记录查询、共享 Device、取消与关闭 | 复用 app 的线程、关联和分块;一个在途请求,冲突为 busy;不重连或重试副作用 |
dlt698.model |
全部现有 Data 标签、精确标量、OAD/OMD、RSD 0–10、MS 0–7、ROAD/RCSD、安全描述符 | 标签保留;整数拒绝 bool/溢出,字节复制;日期保留原始字段 |
dlt698.codec / protocol |
Data/帧/APDU/SECURITY、流解析、GET/SET/ACTION/记录/ThenGet/MD5/REPORT/七类 PROXY 消息 | 复用原生编码与资源限制,完整字段及逐项 DAR 无损保留 |
dlt698.standard |
标准对象/属性查询、相别/费率/电能/需量/谐波 OAD、工程量、记录查询模板 | 原始值可转换为精确十进制文本;浮点转换需显式选择 |
dlt698.expert |
显式驱动 Engine/Endpoint、provider/schema、MemoryRecords、REPORT/Follow/ACD、ProxyRouter、TransBridge、安全后端 | 由同一业务线程持续 poll();Python 扩展点必须及时返回,不能重入或阻塞等待同一运行时 |
dlt698.AsyncClient |
asyncio TCP 关联、GET/SET/ACTION/记录及高级交换、取消、失败重试与异步上下文 | 直接驱动原生异步 Session;loop 所属线程使用,loop 关闭前 aclose() |
dlt698.AsyncServer |
asyncio TCP/串口启停、多连接、共享 Device、事件自动分发、取消收尾及重新启动 | 复用 C++ app::Server;启停等待线程也由 C++ 管理,Python 不创建工作线程 |
普通入口优先;完整消息和扩展点放在分层模块。公开导出都使用显式 __all__,扩展实现模块 _native 为内部接口。低层自定义 channel/executor、手动方向及硬件 drain hooks、自动能力探测、异步客户端串口和其他 ABI 当前登记为待开放,详见 api-map.json;这不会建立另一条版本线。
源码按 C++ 业务层次组织,原生绑定也使用对应目录:
python/src/dlt698/
app/ Client、Server、AsyncClient、AsyncServer、生命周期
common/ 错误、资源限制、执行器与计时器
codec/ Data、链路帧及 APDU 编解码
model/ 原生协议值
protocol/ apdu 消息与 link 帧接口
security/ 安全后端扩展点
service/ Device、对象目录、provider、记录、代理
session/ Engine、会话状态、完成通知
standard/ 标准对象、工程量、记录校验、能力与读取规划
transport/ 原生/自定义通道、I/O 运行时、串口与 RS-485、透明转发桥
expert/ Endpoint 与原有专家入口的兼容汇总
推荐 from dlt698.app import AsyncServer、from dlt698.service import ObjectRegistry 等
业务导入;根入口及原有 dlt698.client / server / async_client / errors / expert 导入仍可使用。
生成工具写入新的目录,不会重新产生扁平模块。
python/tests/ 同样按 app/common/model/protocol/security/service/session/standard/transport/release/interop
分目录;tools/ 保留构建、生成和发布工具,examples/ 保留独立示例。
import asyncio
from dlt698 import AsyncClient, AsyncServer, Data, Oad
async def main():
attribute = Oad(oi=0x200F, attribute=2)
async with AsyncServer() as server:
server.set(attribute, Data.uint16(5000))
await server.start_tcp("127.0.0.1", 0)
async with AsyncClient() as client:
await client.connect_tcp("127.0.0.1", server.local_port)
print((await client.get(attribute)).require_data().as_uint16())
asyncio.run(main())
AsyncServer 的网络与会话线程来自 C++ app::Server,绑定层的 ServerRunner 用
C++ 线程执行启停等待,通过完成通知唤醒 asyncio Future。Python 不使用
Thread、线程池、to_thread 或 run_in_executor。on_event 在 loop 所属线程自动分发,
异常交给 loop 的异常处理器;回调内可调用 close(),之后不再分发事件。
await stop() 保留设备并允许重启;close() 发起终止,await aclose() 等待完整收尾。
启动取消时会等原生操作结束再停止,避免取消后迟到的监听器继续运行。
九类已确认缺口的实现入口、回调约定及验收范围见 补全记录。
AsyncClient 同时提供 await open_serial(path, baud=9600) 和
await open_serial_configured(path, serial, link, profile)。本地端口打开/配置为原生操作,
后续 I/O、LINK 和 CONNECT 通过原生完成队列等待;失败会排空旧运行时,允许重新连接。
await disconnect() 等待 RELEASE 后关闭通道,保留客户端供重连;close() 强制终止,
await aclose() 在空闲关联时优先释放协议连接,再确定性收尾。
from dlt698.service import ProbeOptions
from dlt698.standard import ReadService, service_support
# client 已通过 TCP 或串口关联;预设连接使用本地能力,公共连接使用 CONNECT 协商快照。
support = service_support(client.capabilities, ReadService.list)
points = await client.probe_points(attributes, ProbeOptions(batch_size=16))
for point in points:
print(point.attribute, point.outcome, point.validation_error)
探测复用 C++ 读取规划及逐项校验:保留重复点与顺序,不按业务提示自动删除候选。
PointResult.outcome 为 Data、原始 DAR 或 Error,标准校验失败保留 Data 和 validation_error。
离线规划与验证通过 standard.plan_reads / candidate_points / validate_record_* 使用。
数据、配置和错误
ReadResult 只有 Data 或 DAR 之一。require_data() 是显式要求业务成功,非零 DAR 抛 DarError。列表和 SET/ACTION 保留逐项结果;应用必须自行检查 DAR,不自动回滚或重试。
本地失败抛 Dlt698Error 的分类子类,保留 code / offset / context / remote_code。context_bytes 保存原始文本字节:核心文本为 UTF-8,Windows 系统 I/O 文本可能来自系统代码页;显示文本使用适当解码。超时仍是 TimeoutError 的子类,异步取消使用 asyncio.CancelledError。
Data.uint16(5000) 与 Data.int16(5000) 是不同标签;访问器标签不符抛 TypeError。字节入口接受 bytes / bytearray / 连续一维单字节 memoryview,不接受文本或隐式整数列表。输入和返回均拥有内存,修改原输入不会改变协议快照。
配置通过关键字构造,未知字段报错。时间参数使用有限、非负秒;会话超时及 Engine.poll / IoRuntime.run_for 须为毫秒精度,精度损失报错。执行器延时和虚拟时间按原生时钟刻度处理,支持 RS-485 位时间的小数毫秒。配置字段读取返回副本:
from dlt698 import ClientOptions, SessionOptions
options = ClientOptions(protocol=SessionOptions(request_timeout=2.0))
# 或取出嵌套配置,修改后整体赋回;直接修改 options.protocol 的临时副本不会保存。
protocol = options.protocol
protocol.request_timeout = 3.0
options.protocol = protocol
完整 .pyi 与 py.typed 随 wheel 交付,构造器字段与返回联合类型有明确声明,严格 mypy 校验公开 Python 代码与示例。
线程、事件和高级服务
同步客户端建连/请求/断开以及服务器停止等待期间释放 GIL;另一业务线程可以 request_disconnect() 或 request_stop()。活动对象用 with、close()、async with 确定性收尾;不依赖 GC 执行业务。
同步入口的 on_event 由显式 dispatch_events() 在调用线程分发。默认队列最多 256 项及 1 MiB 字节,超限丢新事件并累计 dropped;事件是诊断观察,不是事务完成。callback 抛异常传播;callback 内关闭后不再分发。库不设置全局日志。
专家 Engine 只接受所属线程访问,禁止在 provider/backend 中重入。poll() 默认预算 1 ms;预算不强行中断业务 callback。事务完成队列默认最多 1024 项和 16 MiB 编码消息字节,超限关闭 Engine 并明确报错。Python provider 收到拥有型参数,可安全保存;目录权限、类型校验、异常转 DAR=255 沿用 C++。
Engine.connect_tcp(..., role=Role.server) 支持协议服务器主动拨号;
Engine.listen(..., role=Role.client) 支持协议客户端接收连接,后者不要求对象目录。
协议服务器始终要求 ObjectRegistry。未传 role 时仍采用拨号客户端、监听服务器的默认值。
link(type, heartbeat_seconds, connection)、release(connection) 返回完成 token;
Completion.traffic 是 Event 副本,含 send/receive、bytes、timestamp、error。
SessionOptions.calendar_clock 接收无参函数并返回 model.DateTime,异常由原生会话关闭处理。
低层接口可将 MemoryChannel.pair(executor) 或自定义 IChannel/IExecutor 与
SessionHandle(channel, executor, options) 组合;通过 attach_services(session, registry)
安装原生普通服务。先 start,再持续驱动执行器。异步完成回调接收拥有型成功值或 Error,
void 成功为 None;自定义完成函数只允许调用一次。IoRuntime.run_for 在当前线程推进原生
TCP/串口 I/O,不启动线程。MemoryObject.bind_method / bind_record 可直接注册便利回调。
SerialLinkOptions.set_transmit 与 async_drain 支持实际 RS-485 驱动控制;
方向控制返回 None/Error,排空函数在最后停止位发出后调用 done(None/Error)。
这些 Python hooks 与日历时钟仅用于调用线程驱动的 Engine/AsyncClient/低层 Session,
托管 Client/Server/AsyncServer 拒绝它们。关闭后继续驱动,直到挂起操作回调排空。
完整扩展点约束及异常处理见 回调与生命周期约定。
ProxyRouter.bind(tsa, engine.session_at()) 将前六类代理路由到已关联原生 Session;所有相关 Engine 必须持续驱动。第七类透明转发使用 TransBridge:传给 Engine(transparent=bridge),应用 drain() 取命令,异步设备完成后 complete(token, ProxyTransResponse(...)) 或完整 Error。桥默认最多 128 项、1 MiB 命令字节;取消后的迟到/重复完成返回 False。桥不调用后台 Python;真实透明端口由应用接入。
SecurityBackend 子类只能配置在调用线程驱动的 Engine/AsyncClient。同步托管 Client/Server 拒绝 Python 安全后端,避免原生工作线程进入 Python。认证、保护和验证均委托实际后端,默认不提供假认证或伪 ESAM。安全 mock 测试仅验证委托,不代表真实设备安全认证。
子类构造时必须完整实现 8 个后端方法,包括 reset。多连接监听配置
SessionOptions(security_backend_factory=YourBackend),每个会话构造时创建独立实例;
不能同时指定 security_backend 和工厂,也不能用于预设关联。C++ 会拒绝仍被其他
存活会话持有的实例,包括工厂错误返回同一实例的情况;仅关闭会话不代表其句柄已析构。
session.validate_session_options(options) 只做配置校验,不调用工厂、不清理后端。
reset 必须返回 None 且幂等;异常通过 sys.unraisablehook 报告,不能跨原生 noexcept。
低层 SessionHandle 支持普通 GET/记录/SET/ACTION、高级请求、诊断、REPORT、
FollowReport 和 ACD 处理器,None 移除处理器。请求参数拥有内存,可以保留;
REPORT 处理器返回 bool,只有 True 才确认。高级处理器接收 (request, done),
done 接受拥有型响应或 Error,至多调用一次;处理器可返回幂等、非阻塞取消函数。
驱动抛异常后的迟到完成被忽略,关闭后的结果由原生会话丢弃。
service.attach_services(session, objects) 安装普通服务;
service.attach_advanced_services(session, objects, executor, options, transparent) 安装
MD5/ThenGet/PROXY,executor 必须与会话一致,transparent 为可选 TransBridge。
service.ProxyProvider 支持 Python 子类,实现 async_request(server, request, done)
即可接入自定义目标;完成和取消约定与高级处理器相同。所有这些 Python 扩展点必须在
调用线程驱动,不创建 Python 工作线程。首批修复状态见 审计记录。
示例与构建隔离
examples/tcp.py、async_tcp.py 展示读取;async_server.py 展示 asyncio 服务端;serial.py 展示实际串口参数;provider.py 展示实时目录。运行示例前先安装包。真实串口/RS-485 的方向、USB 排空及帧间隔必须现场验证;本机没有硬件验收记录。
根 CMake 和 cpp/ 不查找 Python 或 pybind11。Python 单独从 python/CMakeLists.txt 构建,并在自己的构建树静态链接 core/session/service/transport/app;/utf-8 沿用原生目标。wheel 不依赖外部 dlt698 DLL/SDK。Windows 仍需系统支持的 MSVC 运行时,Linux 使用 manylinux 2.28 基线。
同步检查与联合发布
唯一版本源是根 VERSION。包 metadata、原生扩展和包装层构建记录在 import 时一致性校验;正式构建还要求干净提交、源码摘要和绑定清单摘要。sdist 保存身份并在无 Git 重建前核对源码,拒绝修改后的源码冒充原归档。
tools/api_contract.py --runtime 核对公开头文件摘要及实际绑定;tools/ast_inventory.py 核对全部公开声明、重载、成员、枚举和默认参数;tools/generate_stubs.py --check 核对已安装扩展与冻结类型声明。修改 C++ 公开契约后必须同时审核对应清单、绑定、stub 与相关测试,再显式更新清单。
.github/workflows/python-ci.yml 在普通提交中执行安装、向量、类型、格式、AST、C++ 双向互操作及无 Git sdist 重建检查。release.yml 使用 release-matrix.json 的五个平台、四个 CPython 版本构建 20 个 wheel、1 个 sdist,不再重复调用 Python CI 或构建独立 C++ 动静态库包。所有 Python 制品必须满足完整矩阵,且同版本、同提交、同源码与 API 摘要,才能把草稿 Release 公开。发布清单和 SHA256SUMS 随制品交付。
Python 单独修复也提升共享 VERSION 并重建两端;不使用 Python 专属标签、post 版本或覆盖公开制品。正式发布先公开 GitHub Release,再通过独立任务将同一批已校验的 wheel 和 sdist 上传到 PyPI;首次启用需按 PyPI 发布配置 注册 Trusted Publisher。PR 和手动验证运行仅构建 Actions 产物。非 CPython、free-threaded 和子解释器尚未开放;新平台需共同版本验收后加入。
本地已执行范围与外部待验收项目见 验证记录。文档中的完整矩阵是 CI 发布目标,不能据此声称本机已经验证 Linux、macOS 或其他解释器。
Metadata
Release files for dlt698 1.0.0
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| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| dlt698-1.0.0.tar.gz | 1.6 MB | With provenance | Details for dlt698-1.0.0.tar.gz |
Built distributions (wheels)
Total release size: 41.0 MB
Release files / dlt698-1.0.0.tar.gz
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| Tags | CPython 3.14 Linux glibc 2.27+ x86-64 Linux glibc 2.28+ x86-64 |
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| Size | 2.3 MB |
| Tags | CPython 3.14 Linux glibc 2.26+ ARM64 Linux glibc 2.28+ ARM64 |
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