Jupyter 无法下载文件夹如何实现曲线救国

原问题：

https://stackoverflow.com/questions/48122744/how-to-download-all-files-and-folder-hierarchy-from-jupyter-notebook/48141707

解决方法是：

1. 找到你想下载的文件夹

2. 打开文件夹，新建一个ipynb

3. 粘贴下面代码并运行

4. 回到文件夹，刷新，看到多了个archive.tar的压缩文件，下载这个文件解压就行。

import os
import tarfile

def recursive_files(dir_name='.', ignore=None):
 for dir_name,subdirs,files in os.walk(dir_name):
  if ignore and os.path.basename(dir_name) in ignore: 
   continue

  for file_name in files:
   if ignore and file_name in ignore:
    continue

   yield os.path.join(dir_name, file_name)

def make_tar_file(dir_name='.', tar_file_name='tarfile.tar', ignore=None):
 tar = tarfile.open(tar_file_name, 'w')

 for file_name in recursive_files(dir_name, ignore):
  tar.add(file_name)

 tar.close()


dir_name = '.'
tar_file_name = 'archive.tar'
ignore = {'.ipynb_checkpoints', '__pycache__', tar_file_name}
make_tar_file(dir_name, tar_file_name, ignore)

补充 知识：Jupyter安装拓展nbextensions及解决官网下载慢的问题

Anaconda Jupyter安装拓展nbextensions

先在终端pip两个包：

Pip install jupyter_contrib_nbextensions

Pip install jupyter_nbextensions_configurator

安装成功后

Jupyter contrib nbextension install --user

Pip install jupyter_contrib_nbextensions
Pip install jupyter_nbextensions_configurator
Jupyter contrib nbextension install --user

使用豆瓣镜像：

但是直接这样pip下载很慢，简直慢到怀疑人生，下载了半天还下载失败了/(ㄒoㄒ)//(ㄒoㄒ)/

所以我们可以使用豆瓣镜像，即在后面加 -i https://pypi.douban.com/simple

这个堪称神器呀，下载的时候刷刷的O(∩_∩)O

Pip install jupyter_contrib_nbextensions -i https://pypi.douban.com/simple
Pip install jupyter_nbextensions_configurator -i https://pypi.douban.com/simple

后面操作不变：

Jupyter contrib nbextension install --user

Pip install jupyter_contrib_nbextensions -i https://pypi.douban.com/simple
Pip install jupyter_nbextensions_configurator -i https://pypi.douban.com/simple
Jupyter contrib nbextension install --user

最后再打开jupyter

jupyter notebook

操作成功后重启jupyter 如下图所示，增加了Nbextensions一栏

但是刚进去时是灰色的，取消勾选红色圈圈中的勾选项即可

拓展安装完成，现在就可以添加一些常用的插件了(●'◡'●)