这段代码要怎么进行修改？

        #! -*- encoding:utf-8 -*-        import requests        import random        # 要访问的目标页面        targetUrl = "Http://httpbin.org/ip"        # 要访问的目标https页面        # targetUrl = "https://httpbin.org/ip"        # 代理服务器        proxyHost = "t.16yun.cn"        proxyPort = "31111"        # 代理隧道验证信息        proxyUser = "username"        proxyPass = "passWord"        proxyMeta = "http://%(user)s:%(pass)s@%(host)s:%(port)s" % {            "host" : proxyHost,            "port" : proxyPort,            "user" : proxyUser,            "pass" : proxyPass,        }        # 设置 http和https访问都是用HTTP代理        proxies = {            "http"  : proxyMeta,            "https" : proxyMeta,        }        #  设置IP切换头        tunnel = random.randint(1,10000)        headers = {"Proxy-Tunnel": str(tunnel)}        resp = requests.get(targetUrl, proxies=proxies, headers=headers)        print resp.status_code        print resp.text