爬虫需要，一个机器多个口，一个口多个ip，为轮询这些ip
demo
#coding=utf-8
import requests,sys,socket
from requests_toolbelt.adapters import source
reload(sys)
sys.setdefaultencoding('utf-8')
s = requests.Session()
new_source = source.SourceAddressAdapter('192.168.4.2')
s.mount('http://', new_source)
s.mount('https://', new_source)
print s.get('http://xxx.xxx.xxx.xxx:8091/')
需要安装第三方模块requests_toolbelt
pip install requests_toolbelt
Done