jupyter lab（jupyter notebook）中单元格图片的存储方式及导出（还原）方法（关键点：ipynb文件，图片base64编码）-ag真人游戏

问题描述

在jupyter lab（jupyter notebook）记事本（notebook）中单元格中包含图片的情况有三种：

• 在markdown单元格中显示图片。
  • 以markdwon语法插入本地图片。
  • 复制图片、粘贴到单元格中，以图片附件形式保存在单元格中。
• 代码单元格的输出中的图片。

但是jupyter lab并不提供单元格直接导出图片的功能，如何将记事本中的图片导出呢？

分析问题

复制、粘贴图片到markdown单元格中

将上图复制粘贴到markdown单元格中。

运行后效果如下：

以文本形式打开.ipynb文件，可以发现以附件形式出现的图片，并不以文件形式保存在磁盘上，而是以base64编码形式直接保存在.ipynb文件中 。

"cells": [
  {
  
   "attachments": {
  
    "ab7cc708-c91c-4147-89d4-2dbcfa4a361a.png": {
  
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    }
   },
   "cell_type": "markdown",
   "metadata": {
  },
   "source": [ 
    "![图片.png](attachment:ab7cc708-c91c-4147-89d4-2dbcfa4a361a.png)"
   ]
  }
 ],

将上述base64编码还原为图片，如下所示。

代码单元格输出图片

在代码单元格中输入以下内容并运行。

以文本形式打开.ipynb文件。

 "cells": [
  {
  
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
  },
   "outputs": [
    {
  
     "data": {
  
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 1,
     "metadata": {
  },
     "output_type": "execute_result"
    },
    {
  
     "data": {
  
      "image/png": "ivborw0kggoaaaansuheugaaaxoaaad4cayaaadiry33aaaaoxrfwhrtb2z0d2fyzqbnyxrwbg90bgliihzlcnnpb24zljqumswgahr0chm6ly9tyxrwbg90bglilm9yzy/z1a gaaaacxbiwxmaaastaaaleweampwyaaaobeleqvr4no3cf6jd9x3h8edly1pgdxbmtlysmpzfmhuy3a21g1bxjhkfgepgp6z4g7ja1f2xzyhfp9wspwy2y8hel7lg0jktk1tjqcwkpwgmu7xity2iu7pwb5tldk6hyoa07/1xvphjxw7ose6553g/et7gwjnf7/ee /6y5hm/9/s911qvkqr2htppasrjy8vqs1ljdl0knc7qs1ljdl0knw7vpadyam2anbvhw4zjjyfjk8qjjz7606qaoti d13on2zywmzmzkthkkqvjclpftvnprtjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjapyhl6tggxpjatza0cfznmr/kicw2z8ktysztbinydkl9p qzc7j34xqaens8iy5o78d2hyi/rccg7uprcbtc/z/edh1jmnjkpzuyoirahfw8ieo2qlsqj7dwiljtgfi8mvaycd3rzgsjonwjeia/vrghb7nc8dajmcaxwwug/qcsbymmukymz8/p4krjekhlofn2kube6pqbtcbvbwtqqaranpqamozr5kko8 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      "text/plain": [
       "
"
      ]
     },
     "metadata": {
  
      "needs_background": "light"
     },
     "output_type": "display_data"
    }
   ],
   "source": [
    "import matplotlib.pyplot as plt\n",
    "\n",
    "plt.plot([1, 1])"
   ]
  }
 ],

将上述base64编码还原为图片，如下所示。

markdown单元格本地文件

 "cells": [
  {
  
   "cell_type": "markdown",
   "metadata": {
  },
   "source": [
    "![image](1.png) "
   ]
  }
 ],

结论

markdown单元格中的粘贴来的临时图片和代码单元格生成的图片都是以附件（base64编码）形式直接保存在ipynb文件中。如果本地没有保存或者上传图片，可以通过base64编码保存图片。

markdown单元格中的本地图片将不会保存在ipynb文件中，仍然以本地文件形式存储。