在新的python 3 已经没有urllib2了，用新的urllib.request代替。文档中心—百度AI的帮助文件“获取access_token示例代码”

import urllib, urllib2, sys

import ssl

# 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=【官网获取的AK】&client_secret=【官网获取的SK】'

request = urllib2.Request(host)

request.add_header('Content-Type', 'application/json; charset=UTF-8')

response = urllib2.urlopen(request)

content = response.read()

if (content):

    print(content)

应改为：

import urllib, urllib.request, sys
import ssl

# 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=inReQeCbDKV001a0jyFpoY95&client_secret=rxxHTCARZ3yzP9YGw5iUk0zWEk9oLghM'
request = urllib.request.Request(host)
request.add_header('Content-Type', 'application/json; charset=UTF-8')
response = urllib.request.urlopen(request)
content = response.read()
if (content):
    print(content)

望修正或者说明2和3的区别。