python笔记1

1.文件下载

 

方法一：
import urllib 
import urllib2 
import requests
print "downloading with urllib" 
url = 'https://zhidao.baidu.com/question/1449298459673795180.html'  
print "downloading with urllib"
urllib.urlretrieve(url, "demo.html")
方法二：
import urllib2
print "downloading with urllib2"
url = 'https://zhidao.baidu.com/question/1449298459673795180.html' 
f = urllib2.urlopen(url) 
data = f.read() 
with open("demo2.html", "wb") as code:     
    code.write(data)
方法三：
import requests 
print "downloading with requests"
url = 'https://zhidao.baidu.com/question/1449298459673795180.html' 
r = requests.get(url) 
with open("demo3.html", "wb") as code:
     code.write(r.content)

我用的VS2015 需要安装requests引用  我用的“easy_install requests”