你如何调用从C code的Python code？ [英] How do you call Python code from C code?

问题描述

我想用一些新的功能扩展大型C项目，但我真的想将它用Python语言编写。基本上，我想打电话从C code的Python code。然而，Python->Ç包装像SWIG允许的对面，即编写C模块，并在Python调用C

I want to extend a large C project with some new functionality, but I really want to write it in Python. Basically, I want to call Python code from C code. However, Python->C wrappers like SWIG allow for the OPPOSITE, that is writing C modules and calling C from Python.

我在考虑涉及IPC或RPC（我不介意有多个进程）的方法;也就是说，有我的纯Python组件运行在单独的进程（在同一台机器上），并有我的C项目通过写/从插座（或UNIX管道），阅读与它通信。我的Python组件可以读/写套接字进行通信。那是一个合理的做法？是否有更好的东西？像一些特殊的RPC机制？

I'm considering an approach involving IPC or RPC (I don't mind having multiple processes); that is, having my pure-Python component run in a separate process (on the same machine) and having my C project communicate with it by writing/reading from a socket (or unix pipe). my python component can read/write to socket to communicate. Is that a reasonable approach? Is there something better? Like some special RPC mechanism?

感谢您的回答至今 - 不过，我想专注于基于IPC的方法，因为我想有我的Python程序在一个单独的进程作为我的C程序。我不希望嵌入一个Python间preTER。谢谢！

Thanks for the answer so far - however, i'd like to focus on IPC-based approaches since I want to have my Python program in a separate process as my C program. I don't want to embed a Python interpreter. Thanks!

推荐答案

我推荐的办法赘述。它首先解释如何执行Python code的字符串，然后从那里详细介绍了如何建立一个Python环境与C程序交互，从C code调用Python函数，从C操纵Python对象code等。

I recommend the approaches detailed here. It starts by explaining how to execute strings of Python code, then from there details how to set up a Python environment to interact with your C program, call Python functions from your C code, manipulate Python objects from your C code, etc.

修改：如果你真的想去IPC的路线，然后你要使用的的结构模块或更好，但 protlib 。一个Python和C之间的进程通信的大多数路过周围围绕结构来回，要么通过套接字或通过共享内存。

EDIT: If you really want to go the route of IPC, then you'll want to use the struct module or better yet, protlib. Most communication between a Python and C process revolves around passing structs back and forth, either over a socket or through shared memory.

我建议创建带有字段命令 struct和codeS重新present命令及其参数。不知道更多有关你要完成什么，我无法给出更具体的建议，但总的来说，我建议 protlib 库，因为它是我用C和Python程序之间的通信（声明：我是protlib的作者）。

I recommend creating a Command struct with fields and codes to represent commands and their arguments. I can't give much more specific advice without knowing more about what you want to accomplish, but in general I recommend the protlib library, since it's what I use to communicate between C and Python programs (disclaimer: I am the author of protlib).

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