OAuth2 Authorization Using Python

import urllib
import requests
SCOPE = 'douban_basic_common,shuo_basic_r,shuo_basic_w' # getting more access by adding more parameters
APP_KEY = YOUR_APP_KEY # sometimes called API_KEY, obtain upon registration for API
APP_SECRET = YOUR_APP_SECRET # sometimes called API_SECRET, obtain upon registration for API
REDIRECT_URI = YOUR_CALLBACK_URI # this http address would be the address to receive authorization code, and access_token returned from website
DOUBAN_RESPONSE_TYPE = 'code'
DOUBAN_AUTHORIZATION_URI = "https://www.douban.com/service/auth2/"
DOUBAN_ACCESS_TOKEN_URI = "https://www.douban.com/service/auth2/"
v = {'client_id':APP_KEY, 'redirect_uri':REDIRECT_URI,'response_type':'code','scope':SCOPE}
params = urllib.urlencode(v)
url = DOUBAN_AUTHORIZATION_URI+params
# now, go to your browser, go to your generated url, click on accept authorization, then you would be redirect to REDIRECT_URI+code=YOUR_AUTHORIZATION_CODE, the YOUR_AUTHORIZATION_CODE would be appended at the end of that address
code = YOUR_AUTHORIZATION_CODE
# up to this point, you finished first step, obtain authorization code
v2 = {'client_id':APP_KEY, 'client_secret':APP_SECRET','redirect_uri':REDIRECT_URI, 'grant_type':'authorization_code','code':code}
url2 = DOUBAN_ACCESS_TOKEN_URI
r = requests.post(url2,data = v2)
r.status_code # should be 200 if everything is right
r_json = r.json()
# now you could see response in json format, with access_token in it