{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "a59722d6",
   "metadata": {},
   "source": [
    "Polyglot Netebooks 中，添加Jupyter内核，支持Python语言\n",
    "===================================================="
   ]
  },
  {
   "cell_type": "markdown",
   "id": "23bcd178",
   "metadata": {},
   "source": [
    "使用魔术命令 \n",
    "\n",
    "无Conda环境：`#!connect jupyter --kernel-name pythonkernel --kernel-spec python3`\n",
    "有Conda环境：`#!connect jupyter --kernel-name pythonkernel --conda-env base --kernel-spec python3`\n",
    "\n",
    "实测有缺点：\n",
    "+ 不能重复执行：重复执行会报错\n",
    "+ 连接字符串必须是真实字符串：不能是变量，不灵活；明文\"不安全\",比如演示环境\n",
    "\n",
    "变通用法：在C#程序中，拼接好魔术命令`#!connect`，再发送给内核执行"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "b10341c4",
   "metadata": {
    "polyglot_notebook": {
     "kernelName": "csharp"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "名为 Pythonkernel 的内核已存在。需要新内核时，请为--kernel-name参数使用不同的值, 本次执行不做任何更改！\r\n"
     ]
    }
   ],
   "source": [
    "//魔术命令\n",
    "//  #!connect jupyter --kernel-name pythonkernel --kernel-spec python3\n",
    "//  #!connect jupyter --kernel-name pythonkernel --conda-env base --kernel-spec python3\n",
    "\n",
    "using Microsoft.DotNet.Interactive;\n",
    "using Microsoft.DotNet.Interactive.Commands;\n",
    "\n",
    "//优化方式\n",
    "{\n",
    "    //内核名：\n",
    "    string magicCommandKernelName =  \"Pythonkernel\";\n",
    "\n",
    "    //引入内核：可重复执行\n",
    "    if(Microsoft.DotNet.Interactive.Kernel.Root.FindKernelByName(magicCommandKernelName) == null)\n",
    "    {\n",
    "        var connectKernelCode = $\"#!connect jupyter --kernel-name {magicCommandKernelName} --kernel-spec python3\";\n",
    "        await Kernel.Root.SendAsync(new SubmitCode( connectKernelCode,  \"csharp\"));\n",
    "    }\n",
    "    else\n",
    "    {\n",
    "        Console.WriteLine($\"名为 {magicCommandKernelName} 的内核已存在。需要新内核时，请为--kernel-name参数使用不同的值, 本次执行不做任何更改！\");\n",
    "    }\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "polyglot_notebook": {
     "kernelName": "pythonkernel"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hello,python3!\n"
     ]
    }
   ],
   "source": [
    "#!Pythonkernel\n",
    "# 写 python 代码\n",
    "print(\"hello,python3!\");"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": ".NET (C#)",
   "language": "C#",
   "name": ".net-csharp"
  },
  "language_info": {
   "name": "polyglot-notebook"
  },
  "polyglot_notebook": {
   "kernelInfo": {
    "defaultKernelName": "csharp",
    "items": [
     {
      "aliases": [],
      "languageName": "csharp",
      "name": "csharp"
     },
     {
      "aliases": [],
      "languageName": "python",
      "name": "pythonkernel"
     },
     {
      "aliases": [],
      "languageName": "python",
      "name": "Pythonkernel"
     }
    ]
   }
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}