使用Jupyter中的浏览按钮上传文件并使用/保存它们 [英] Uploading files using Browse Button in Jupyter and Using/Saving them

问题描述

我遇到了此片段，用于上传文件在Jupyter但是我不知道如何保存这个文件在执行代码的机器上，或者如何显示上传文件的前5行。基本上，我正在寻找适当的命令来访问文件上传后：

 从IPython导入io 
。显示导入显示
导入fileupload 
 $ b $ def _upload（）：
 
 _upload_widget = fileupload.FileUploadWidget（）
 $ b $ def _cb（change） ：
 decode = io.StringIO（change ['owner']。data.decode（'utf-8'））
 filename = change ['owner']。filename 
 print（'上传的格式（
 filename，len（decode.read（））/ 2 ** 10））
 
 _upload_widget.observe _cb，names ='data'）
 display（_upload_widget）
 
 _upload（）
  

<当上传完成时调用 c> 。如上面注释中所述，您可以在那里写入文件，或将其存储在变量中。例如：

  from IPython.display import display 
 import fileupload 
 
 uploader = fileupload .fileUploadWidget（）
 $ b def _handle_upload（change）：
w = change ['owner'] 
打开（w.filename，'wb'）为f：$ b $格式（
 w.filename，len（w.data）/ 2 *）b f.write（w.data）
 print（'Uploaded`{} * 10））
 
 uploader.observe（_handle_upload，names ='data'）
 
 display（uploader）
  

上传完成后，您可以访问文件名：

  uploader.filename 
  

I came across this snippet for uploading files in Jupyter however I don't know how to save this file on the machine that executes the code or how to show the first 5 lines of the uploaded file. Basically I am looking for proper commands for accessing the file after it has been uploaded:

import io
from IPython.display import display
import fileupload

def _upload():

    _upload_widget = fileupload.FileUploadWidget()

    def _cb(change):
        decoded = io.StringIO(change['owner'].data.decode('utf-8'))
        filename = change['owner'].filename
        print('Uploaded `{}` ({:.2f} kB)'.format(
            filename, len(decoded.read()) / 2 **10))

    _upload_widget.observe(_cb, names='data')
    display(_upload_widget)

_upload()

解决方案

_cb is called when the upload finishes. As described in the comment above, you can write to a file there, or store it in a variable. For example:

from IPython.display import display
import fileupload

uploader = fileupload.FileUploadWidget()

def _handle_upload(change):
    w = change['owner']
    with open(w.filename, 'wb') as f:
        f.write(w.data)
    print('Uploaded `{}` ({:.2f} kB)'.format(
        w.filename, len(w.data) / 2**10))

uploader.observe(_handle_upload, names='data')

display(uploader)

After the upload has finished, you can access the filename as:

uploader.filename

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