如何从 C# 运行 Python 脚本? [英] How do I run a Python script from C#?

问题描述

这样的问题以前也有人不同程度的问过，但我觉得回答的不够简洁，所以又问了一遍.

This sort of question has been asked before in varying degrees, but I feel it has not been answered in a concise way and so I ask it again.

我想用 Python 运行一个脚本.假设是这样的:

I want to run a script in Python. Let's say it's this:

if __name__ == '__main__':
    with open(sys.argv[1], 'r') as f:
        s = f.read()
    print s

获取文件位置，读取它，然后打印其内容.没那么复杂.

Which gets a file location, reads it, then prints its contents. Not so complicated.

好的，那么我如何在 C# 中运行它?

Okay, so how do I run this in C#?

这就是我现在所拥有的:

This is what I have now:

    private void run_cmd(string cmd, string args)
    {
        ProcessStartInfo start = new ProcessStartInfo();
        start.FileName = cmd;
        start.Arguments = args;
        start.UseShellExecute = false;
        start.RedirectStandardOutput = true;
        using (Process process = Process.Start(start))
        {
            using (StreamReader reader = process.StandardOutput)
            {
                string result = reader.ReadToEnd();
                Console.Write(result);
            }
        }
    }

当我将 code.py 位置作为 cmd 传递，将 filename 位置作为 args 传递时，它不会工作.有人告诉我应该将 python.exe 作为 cmd 传递，然后将 code.py filename 作为 args.

When I pass the code.py location as cmd and the filename location as args it doesn't work. I was told I should pass python.exe as the cmd, and then code.py filename as the args.

我已经找了一段时间了，只能找到建议使用 IronPython 之类的人.但是一定有办法从C#调用Python脚本.

I have been looking for a while now and can only find people suggesting to use IronPython or such. But there must be a way to call a Python script from C#.

一些说明:

我需要从 C# 运行它，我需要捕获输出，我不能使用 IronPython 或其他任何东西.无论你有什么黑客都可以.

I need to run it from C#, I need to capture the output, and I can't use IronPython or anything else. Whatever hack you have will be fine.

P.S.:我运行的实际 Python 代码比这复杂得多，它返回我在 C# 中需要的输出，并且 C# 代码会不断调用 Python 代码.

P.S.: The actual Python code I'm running is much more complex than this, and it returns output which I need in C#, and the C# code will be constantly calling the Python code.

假设这是我的代码:

    private void get_vals()
    {
        for (int i = 0; i < 100; i++)
        {
            run_cmd("code.py", i);
        }
    }

推荐答案

它不工作的原因是因为你有 UseShellExecute = false.

The reason it isn't working is because you have UseShellExecute = false.

如果您不使用 shell，则必须提供 python 可执行文件的完整路径作为 FileName，并构建 Arguments 字符串以提供您的脚本和您要读取的文件.

If you don't use the shell, you will have to supply the complete path to the python executable as FileName, and build the Arguments string to supply both your script and the file you want to read.

另请注意，除非UseShellExecute = false，否则您不能RedirectStandardOutput.

Also note, that you can't RedirectStandardOutput unless UseShellExecute = false.

我不太确定应该如何为 python 设置参数字符串的格式，但您需要这样的东西:

I'm not quite sure how the argument string should be formatted for python, but you will need something like this:

private void run_cmd(string cmd, string args)
{
     ProcessStartInfo start = new ProcessStartInfo();
     start.FileName = "my/full/path/to/python.exe";
     start.Arguments = string.Format("{0} {1}", cmd, args);
     start.UseShellExecute = false;
     start.RedirectStandardOutput = true;
     using(Process process = Process.Start(start))
     {
         using(StreamReader reader = process.StandardOutput)
         {
             string result = reader.ReadToEnd();
             Console.Write(result);
         }
     }
}

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