update

.gitignore

 .ipynb_checkpoints/
 scipy2018-jupyterlab-tutorial/*
 scipy2018-jupyterlab-tutorial/
+ijava-1.3.0.zip
+install.py
+java/*
+java/
+*.ipyhistory

007-多内核.ipynb

+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "bf3f1c1b-0829-4d30-9540-4c49b1358e63",
+   "metadata": {},
+   "source": [
+    "## jupyter 多内核使用\n",
+    "\n",
+    "jupyter 支持了多种语言，每一种语言对应一个/多个类型的 kernel，kernel 的列表可以参考 <https://github.com/jupyter/jupyter/wiki/Jupyter-kernels>\n",
+    "\n",
+    "查看已经安装的 kernel 命令为：\n",
+    "\n",
+    "```bash\n",
+    "jupyter kernelspec list\n",
+    "```\n",
+    "\n",
+    "### Python2\n",
+    "\n",
+    "如果你本机已经安装了 Python2 ，则可以通过运行以下命令来增加 python2 的 kernel：\n",
+    "\n",
+    "```bash\n",
+    "# Step 1 - Install ipython kernel for python2\n",
+    "python2 -m pip install ipykernel\n",
+    "\n",
+    "# Step 2 - python2 kernel\n",
+    "python2 -m ipykernel install --user\n",
+    "```\n",
+    "\n",
+    "这个时候就可以通过 `jupyter kernelspec list` 来查看目前已经安装及支持的  kernel 类型\n",
+    "\n",
+    "\n",
+    "### Java\n",
+    "\n",
+    "Java 的 内核并不是官方提供的，是社区开发者维护的一个内核，这里我们使用 IJava 这个项目来安装 Java 内核：\n",
+    "\n",
+    "GitHub: <https://github.com/SpencerPark/IJava>\n",
+    "\n",
+    "这里我们使用从 release 下载 zip 包的方式来安装，具体的步骤为：\n",
+    "\n",
+    "1. 从 GitHub 上 下载 IJava release\n",
+    "2. 安装 IJava 内核\n",
+    "3. 查看已安装的内核\n",
+    "\n",
+    "```bash\n",
+    "# Step 1 - 下载 Release\n",
+    "wget https://github.com/SpencerPark/IJava/releases/download/v1.3.0/ijava-1.3.0.zip\n",
+    "\n",
+    "# Step 2 - 安装 IJava\n",
+    "## unzip\n",
+    "unzip ijava-1.3.0.zip\n",
+    "## 执行 install.py\n",
+    "python install.py --sys-prefix\n",
+    "```\n",
+    "\n",
+    "最后通过 `jupyter kernelspec list` 来查看是否添加上 Java 的 kernel\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

补充阅读.md

@@ -14,4 +14,4 @@
 ## 资源网站
 
 - [IPython Blocks @ 一个共享用 notebook 来控制颜色色块代码的挺有意思的网站](http://www.ipythonblocks.org/)
-
+- [社区维护的内核列表 @ GitHub](https://github.com/jupyter/jupyter/wiki/Jupyter-kernels)