top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

How to resume a file download in Python 3?

+2 votes
556 views

I would like to download a file. If the connection is OK, I can download the file with:

import urllib.request
urllib.request.urlretrieve(remote_file, local_file)

Sometimes when I am connected on week wireless (not mine) network I get WinError 10054 exception (windows 7). When it happens, I would like to resume download instead of doing everything from very beginning.

How to do that? I read about Range header and chunks, but this server doesn't have any headers.
What options do I have with this particular file?

posted Jun 30, 2015 by Sheetal Chauhan

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

If the web server supports the range request then you can add the Range header to your request:

Range: bytes=StartPos-StopPos

You will receive the part between StartPos and StopPos. If dont know the StopPos just use:

Range: bytes=StartPos-

So your code would be:

def resume_download(fileurl, resume_byte_pos):
    resume_header = {'Range': 'bytes=%d-' % resume_byte_pos}
    return requests.get(fileurl, headers=resume_header, stream=True,  verify=False, allow_redirects=True)
answer Jul 1, 2015 by Amit Kumar Pandey
Similar Questions
+2 votes

I am working on drawing map from shape file in Python 3.2 basemap. But, the longitude values at the bottom axis are only shown partially. Also, all latitude values are missing.

Here is my python code.

import shapefile as sf
import sys
import numpy as np
import matplotlib.pylab as plt
from mpl_toolkits.basemap import Basemap

 map = Basemap(projection='stere', lon_0=-106.4, lat_0= 31.9, lat_ts = 31.9, 
 llcrnrlat=31.7, urcrnrlat= 31.85, 
 llcrnrlon=-106.5 , urcrnrlon= -106.1, 
 rsphere=6371200., resolution='l', area_thresh=1000)

 plt.figure(num=None, figsize=(10, 8), dpi=80, facecolor='w', edgecolor='k')

parallels = np.arange(31.7, 31.85, 0.25)

map.drawparallels(parallels, labels=[0, 0, 0, 1] , fontsize=10, labelstyle='+/-', dashes=[2, 2])

meridians = np.arange (-106.5, -106.1, 0.25)

map.drawmeridians(meridians, labels=[0, 0, 0, 1], fontsize=10, labelstyle='+/-' , dashes=[2, 2])

No matter how I changed the labels, the latitude/longitude legend values are still missing.

+1 vote

I'd like to have the option to download the source code as text/plain from the docs.python.org pages.

For example: when I'm a docs page, such as:
http://docs.python.org/2/library/string.html

and I click the source code link I'm taken to a Mercurial page:
http://hg.python.org/cpython/file/2.7/Lib/string.py

but over there there's no way to get a clean text/plain version of the code because the line numbers are included.

A link to the text/plain version on that page would be nice!

+1 vote

I want to install path.py in my Python 3.4 environment on a Centos 5 box. My /usr/local/bin/ contains:

easy_install-3.4 
python3.4  
etc. 

We are behind a proxy server and I tried this:

# /usr/local/bin/easy_install-3.4 path.py 

Searching for path.py 
Reading https://pypi.python.org/simple/path.py/ 
Download error on https://pypi.python.org/simple/path.py/: hostname '172.29.68.1  
' doesn't match either of 'www.python.org', 'python.org', 'pypi.python.org',  
'docs.python.org', 'testpypi.python.org', 'bugs.python.org', 'wiki.python.org',  
'hg.python.org', 'mail.python.org', 'packaging.python.org', 'pythonhosted.org',  
'www.pythonhosted.org', 'test.pythonhosted.org', 'us.pycon.org', 'id.python.org' --  
Some packages may not be found! 

Couldn't find index page for 'path.py' (maybe misspelled?), Am I best to use pip or easy_install? also if easy_install, how can I fix the above error?

0 votes

How to read/load the cmake file in python and access its elements. I have a scenario, where i need to load the make file and access its elements. I have tried reading the make file as text file and parsing it,but its not the ideal solution. Please let me know how to load the .mk file and access its elements in python.

...