c# 用pythonnet 嵌入Python代码

C# 用pythonnet 嵌入Python代码，可以导入第三方库和自己python代码

我的测试环境

• window10
• conda 23.1.0(python3.10.9)
• Microsoft Visual Studio Community 2022 (64 位) - Current版本 17.5.0

运行结果

步骤

1. 安装python(或anaconda)
2. 在VS项目NuGet中安装pythonnet
   • 工具->NuGet->管理…
3. 创建python环境
   • 创建专用虚拟环境（windows下首先切换到要建立虚拟环境的根目录下），执行

   conda create --prefix=D:condaenvenv_name python=3.10

   路径及python版本根据需要自定义。
   • 使用Anaconda Prompt，激活虚拟环境

   conda activate F:condaenvenv_name

   • 安装Numpypip install numpy
4. 如果为C#界面程序，需要配置为x64环境（与python吻合）
   • 鼠标放在VS项目上，右键属性->生成->常规->目标平台->选择x64
5. 如果是自己的代码，需要放到建立虚拟环境包目录“{虚拟环境安装位置}Libsite-packages”中
6. 代码示例
   • c#

   using Python.Runtime;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.IO;string pathToVirtualEnv = "D:condaenvenv_name";//string pathToVirtualEnv = "E:anaconda3";Environment.SetEnvironmentVariable("PATH", pathToVirtualEnv, EnvironmentVariableTarget.Process);Environment.SetEnvironmentVariable("PYTHONHOME", pathToVirtualEnv, EnvironmentVariableTarget.Process);Environment.SetEnvironmentVariable("PYTHONPATH", $"{pathToVirtualEnv}Libsite-packages;{pathToVirtualEnv}Lib;E:anaconda3Librarybin;E:anaconda3Libraryusrbin;E:anaconda3Scripts", EnvironmentVariableTarget.Process);Runtime.PythonDLL = "D:condaenvenv_namepython310.dll";//Runtime.PythonDLL = "E:anaconda3python310.dll";PythonEngine.PythonHome = pathToVirtualEnv;PythonEngine.PythonPath = PythonEngine.PythonPath + ";" + Environment.GetEnvironmentVariable("PYTHONPATH", EnvironmentVariableTarget.Process);PythonEngine.Initialize();using (Py.GIL()){    dynamic np = Py.Import("numpy");    //dynamic np1 = Py.Import("test3");    //Console.WriteLine(np1.Add(2));    //Console.WriteLine(np.cos(np.pi * 2));    //py.hello();    double c = (double)(np.array(1));    Console.WriteLine(c);}

   • winForm

   using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using Python.Runtime;namespace DemoPythonnet{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        public dynamic np   = null;        public dynamic a;        public dynamic b;        private void Form1_Load(object sender, EventArgs e)        {            string pathToVirtualEnv = "D:condaenvenv_name";            Environment.SetEnvironmentVariable("PATH", pathToVirtualEnv, EnvironmentVariableTarget.Process);            Environment.SetEnvironmentVariable("PYTHONHOME", pathToVirtualEnv, EnvironmentVariableTarget.Process);            Environment.SetEnvironmentVariable("PYTHONPATH", $"{pathToVirtualEnv}Libsite-packages;{pathToVirtualEnv}Lib", EnvironmentVariableTarget.Process);            Runtime.PythonDLL = "D:condaenvenv_namepython310.dll";            PythonEngine.PythonHome = pathToVirtualEnv;            PythonEngine.PythonPath = PythonEngine.PythonPath + ";" + Environment.GetEnvironmentVariable("PYTHONPATH", EnvironmentVariableTarget.Process);            PythonEngine.Initialize();            np = Py.Import("numpy");        }        private void button1_Click(object sender, EventArgs e)        {            //使用第三方库            using (Py.GIL())            {                Console.WriteLine(np.cos(np.pi * 2));                dynamic sin = np.sin;                Console.WriteLine(sin(5));                double c = (double)(np.cos(5) + sin(5));                Console.WriteLine(c);                a = np.array(new List { 1, 2, 3 });                Console.WriteLine(a.dtype);                b = np.array(new List { 6, 5, 4 }, dtype: np.int32);                Console.WriteLine(b.dtype);                Console.WriteLine(a * b);            }        }        private void button2_Click(object sender, EventArgs e)        {            using (Py.GIL())            {                Console.WriteLine(a * b);            }        }    }}

感谢 https://blog.csdn.net/The_Moon_/article/details/127208124
感谢 https://blog.csdn.net/weixin_44064908/article/details/129270649