在C#.N中编译、运行和导入Python模块

Question

我一直试图在C#.Net环境中运行python。它在不导入任何库的情况下成功地编译和运行了python脚本。但是，我需要在C#.Net中运行的python脚本中导入numpy，以便正确执行它。 这是我的源代码，没有导入库并成功：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
using IronPython.Hosting;
using Microsoft.CSharp.RuntimeBinder;

    namespace TestProject
    {
        class Program
        {
            static void Main(string[] args)
            {
                 Console.WriteLine("Enter the text you would like the script to print!");
                 var script =
                     "class MyClass:\r\n" +
                     "    def __init__(self):\r\n" +
                     "        pass\r\n" +
                     "    def go(self, input):\r\n" +
                     "        print('From dynamic python: ' + input)\r\n" +
                     "        return input";

                try
                {

                    var engine = Python.CreateEngine();
                    var scope = engine.CreateScope();
                    var ops = engine.Operations;

                    engine.Execute(script, scope);
                    var pythonType = scope.GetVariable("MyClass");
                    dynamic instance = ops.CreateInstance(pythonType);
                    var value = instance.go(input);
                    Console.WriteLine(value);

                }
                catch (Exception ex)
                {
                    Console.WriteLine("Oops! There was an exception" +
                      " while running the script: " + ex.Message);
                }

                Console.WriteLine("Press enter to exit...");
                Console.ReadLine();

但是，当我试图导入numpy时：

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Diagnostics;
    using IronPython.Hosting;
    using Microsoft.CSharp.RuntimeBinder;

        namespace TestProject
        {
            class Program
            {
                static void Main(string[] args)
                {
                     Console.WriteLine("Enter the text you would like the script to print!");
                     var script =
                         "import numpy" //I added this module
                         "class MyClass:\r\n" +
                         "    def __init__(self):\r\n" +
                         "        pass\r\n" +
                         "    def go(self, input):\r\n" +
                         "        print('From dynamic python: ' + input)\r\n" +
                         "        return input";

                    try
                    {

                        var engine = Python.CreateEngine();
                        var scope = engine.CreateScope();
                        var ops = engine.Operations;

                        engine.Execute(script, scope);
                        var pythonType = scope.GetVariable("MyClass");
                        dynamic instance = ops.CreateInstance(pythonType);
                        var value = instance.go(input);
                        Console.WriteLine(value);

                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("Oops! There was an exception" +
                          " while running the script: " + ex.Message);
                    }

                    Console.WriteLine("Press enter to exit...");
                    Console.ReadLine();

它给了我错误：

No module named numpy

如何解决这个问题，谢谢。

Answer 1

IronPython是在.Net运行时之上的一个Python实现。它只能导入和使用纯Python编写的模块，或者是随IronPython本身分发的标准库的一部分。据我所知，numpy不是其中之一，它是一个基于C的扩展。

我希望您安装了一些其他基于C的Python实现（常规的CPython、Anaconda或其他东西），然后在其中添加了numpy，您正试图从IronPython调用它。那是不可能的。

最好将Python脚本保存在一个.py文件中，然后将其作为参数传递给Python.exe并检索结果。你可以用普通的.Net来实现这一点，寻找从C#运行任何exe的方法。