通过C ++桥从.NET调用的Python [英] Calling Python from .NET via C++ bridge

问题描述

在每两个月我谷歌的从.NET调用Python的时候，我太累了，重塑/端口的东西，发现在Python一些很酷的代码。这两种流行的解决方案是启动一个外部进程或使用IronPython的

Once per a couple of months I google for "Call Python from .NET" when I am too tired to reinvent/port stuff and find some cool code in Python. The two popular solutions are to start an external process or to use IronPython

IronPython的是不是因为我可能要使用Python的原因我的选择通常是有些库依靠numpy的/ ScyPy。

IronPython is not an option for me since the reason I might want to use Python is usually some libraries that depend on NumPy/ScyPy.

最近我开始学习C ++的最基础，并已发现，人们可以用C把Python ++，并已发现了的文章用一个例子。

Recently I started to learn the very basics of C++ and have found that one could embed Python in C++, and have found an article with an example.

从.NET调用C ++是通过P / Invoke的非常容易。所以，我的方案是调用与.NET数据的一些Python脚本，并得到返回结果。

Calling C++ from .NET is very easy via P/Invoke. So my scenario is to call some Python script with data from .NET and get results back.

在我开始挖掘更深我要问，如果有人试图这种方法，这是可行的，或有更好的方法？

Before I start digging deeper I want to ask if someone has tried this approach, is this feasible or there are better ways?

具体而言，

• 将全部Python的库工作时嵌入，例如： numpy的，ScyPy，熊猫，PyMC等？


• 会以同样的方式嵌入Python的工作，C ++ / CLI与标准C ++？


• 如何将复杂的数据传递到Python：序列化到JSON或有类型之间的映射

性能是一个问题：主要使用情况下是做实时数据的一个滑动窗口上的一些数字工作。我认为，外部流程是频繁调用很慢？ - 请纠正我，如果我错了。

Performance is a concern: the main use case is to do some numeric work on a sliding window of real time data. I think external process is very slow for frequent calls - please correct me if I am wrong?

推荐答案

我已经用它曾经在方式如下： -

I have used it once in following way:-

有一个C＃DLL从中我需要查询数据。所以，我开发的C ++ / CLI模块与该DLL交互和处理，一些代表，并对应于数据事件。那么C ++模块会接受这个数据，处理它，并将其发送给Python模块。

There was a C# dll from which I need to query for data. So, I developed C++/CLI module to interact with that dll and handled some delegates and events corresponding to that data. Then C++ module would accept this data, process it and send it to python module.

差距Python和C ++之间使用ZMQ（更换为普通插座）和谷歌的协议充满缓冲区（序列化和反序列化机制）。蟒蛇什么会做的仅仅是发送请求给C ++，然后转移，为C ++ / CLI模块，在获取数据将通过ZMQ到Python ...

Gap between python and c++ was filled using zmq ( replacement for plain sockets ) and google protocol buffers ( serialization and deserialization mechanism ). What python would do is just send request to C++ which then transfers that to C++/ CLI module which on getting data would push through zmq to python...

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