Ways to download files in Python

The previous time is crawling text, recently ready to crawl pictures

Two ways to save files have been found

One is to use the Urllib.urlretrieve method

#-*-coding:utf-8-*-import urllibdef callbackfunc (Blocknum, BlockSize, totalsize):    "' Callback function    @blocknum: Data Block    @blocksize: The size of the data block    @totalsize: The size of the remote file    "'    percent = 100.0 * Blocknum * blocksize/totalsize< C7/>if percent >:        percent =    #格式化输出,% equivalent to escape    print "%.2f%%"% percent#local = ' d:\\sina.html ' # Urllib.urlretrieve (URL, local, callbackfunc)

This callback function is quite convenient, in the next large file, you can visually see the download situation

Another is to use the open and write methods to download

#-*-coding:utf-8-*-import urllibimport osurl = ' http://pic10.nipic.com/20101014/3367900_101327028816_2.jpg ' # Urllib.urlretrieve (URL, local, callbackfunc) u=urllib.urlopen (URL) data=u.read () filename= "123.jpg" # Select Images Directory Os.chdir ("Images") f =open (FileName, ' WB ') f.write (data) print U "Download", Filenamef.close ()

Ways to download files in Python