百度聊天机器人UNIT http访问

#-*- version: Python3.0 -*
#-*- coding: UTF-8      -*
import urllib
import urllib.request
import sys
import ssl
import json

# client_id 为官网获取的AK， client_secret 为官网获取的SK
host = 'https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=eiBsX7AmncXIANL7yCGojkTA&client_secret=OnqEu2UEfSd6aPA7evwHYGg5EFRE0Tia'
request = urllib.request.Request(host)
request.add_header('Content-Type', 'application/json; charset=UTF-8')
response = urllib.request.urlopen(request)
resp_taken = response.read()

#if (resp_taken):
#    print(resp_taken)

text = json.loads(resp_taken)
#print(text["access_token"])

headers = {'Content-Type':'application/json'}
access_token = text["access_token"]
url = 'https://aip.baidubce.com/rpc/2.0/unit/service/chat?access_token=' + access_token
post_data = "{"log_id":"UNITTEST_10000","version":"2.0","service_id":"S20837","session_id":"","request":{"query":"你几岁了","user_id":"88888"},"dialog_state":{"contexts":{"SYS_REMEMBERED_SKILLS":["1057"]}}}"
request = urllib.request.Request(url,data=post_data.encode('utf-8'),headers=headers)
response = urllib.request.urlopen(request)
content = response.read().decode("utf-8")

#if content:
#    print(content)

text1 = json.loads(content)
print(text1['result']['response_list'][0]['action_list'][0]['say'])