python unicode转str

import requests
import urllib2
import urllib
import json
import re
s=requests.session()
print s.headers
url = "https://licai.yingyinglicai.com/user/login.htm"
headers={
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Host': 'licai.yingyinglicai.com',
    'Referer': 'https://licai.yingyinglicai.com/index.htm',
}
r = s.get(url,headers=headers)
r=r.text
#print s
print type(r)
r = r.encode('unicode-escape')
print type(r)

C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/Django/a16.py
{'Connection': 'keep-alive', 'Accept-Encoding': 'gzip, deflate', 'Accept': '*/*', 'User-Agent': 'python-requests/2.18.4'}
<type 'unicode'>
<type 'str'>


decode 是解码str到unicode

encode 是编码unicode到str