import urllib

import urllib2

import requests

url = 'http://www.blog.pythonlibrary.org/wp-content/uploads/2012/06/wxDbViewer.zip' #如果你下载的文件是rar，下面就换成.rar,下载的是txt就换成.txt,

print "downloading with urllib"

urllib.urlretrieve(url, "code.zip")

print "downloading with urllib2"

f = urllib2.urlopen(url)

data = f.read()

with open("code2.zip", "wb") as code:

    code.write(data)

print "downloading with requests"

r = requests.get(url)

with open("code3.zip", "wb") as code:#.zip是根据文件格式来判断的，这地方只起到了重命名的作用

    code.write(r.content)

看起来使用urllib最为简单，一句语句即可。当然你可以把urllib2缩写成：

f = urllib2.urlopen(url) with open("code2.zip", "wb") as code:

code.write(f.read())