【实例1】京东页面爬取

url：http://item.jd.com/2967929.html

import requests
url = 'http://item.jd.com/2967929.html'
try:
    r = requests.get(url)
    r.raise_for_status()
    r.encoding = r.apparent_encoding
    print(r.text[:1000])
except:
    print("error!")