利用程序自己编写下载文件挺有意思的。Python中最流行的方法就是通过Http利用urllib或者urllib2模块。当然你也可以利用ftplib从ftp站点下载文件。此外Python还提供了另外一种方法requests。
来看看三种方法是如何来下载zip文件的:
import urllib
import urllib2
import requests
url = 'http://www.blog.pythonlibrary.org/wp-content/uploads/2012/06/wxDbViewer.zip'
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:
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())