Tengo la siguiente implementación de untwitter cliente usandorauth (OAuth1), basado en eltwitter-timeline-cli.py guión en elRauth ejemplos:

from rauth.service import OAuth1Service

class TwitterClient:

    KNOWN_USERS = {
        'user1' : ("xxx", "yyy", "2342354"), # These should be real tokens
    }

    def __init__(self):
        # Get a real consumer key & secret from https://dev.twitter.com/apps/new
        self.twitter = OAuth1Service(
            name='twitter',
            consumer_key=TWITTER_CONSUMER_KEY,
            consumer_secret=TWITTER_CONSUMER_SECRET,
            request_token_url='https://api.twitter.com/oauth/request_token',
            access_token_url='https://api.twitter.com/oauth/access_token',
            authorize_url='https://api.twitter.com/oauth/authorize',
            base_url='https://api.twitter.com/1/')

    def authorize(self):
        request_token, request_token_secret = self.twitter.get_request_token()
        authorize_url = self.twitter.get_authorize_url(request_token)
        print 'Visit this URL in your browser: ' + authorize_url
        pin = raw_input('Enter PIN from browser: ')
        return request_token, request_token_secret, pin

    def init_session(self, user):
        if user in self.KNOWN_USERS :
            request_token, request_token_secret, pin = self.KNOWN_USERS[user]
        else:
            request_token, request_token_secret, pin = self.authorize()
        session = self.twitter.get_auth_session(request_token,
                                                request_token_secret,
                                                method='POST',
                                                data={'oauth_verifier': pin})
        return session

    def list_tweets(self, user):
        session = self.init_session(user)
        params = {'include_rts': 1,  # Include retweets
                  'count': 10}       # 10 tweets

        r = session.get('statuses/home_timeline.json', params=params)

        for i, tweet in enumerate(r.json(), 1):
            handle = tweet['user']['screen_name'].encode('utf-8')
            text = tweet['text'].encode('utf-8')
            print '{0}. @{1} - {2}'.format(i, handle, text)

tc = TwitterClient()

tc.list_tweets('user1')

La idea es que, si no se conoce al usuario, se le solicite que autorice la aplicación. Si, por otro lado, el usuario ya ha autorizado esta aplicación, los tokens de autorización (request_token, request_token_secret, pin) deben reutilizarse (normalmente los tokens se encuentran en una base de datos; por el momento, están codificados en guión)

Pero esto no está funcionando:

Traceback (most recent call last):
  File "my-twitter-timeline-cli.py", line 56, in <module>
    tc.list_tweets('user1')
  File "my-twitter-timeline-cli.py", line 43, in list_tweets
    session = self.init_session(user)
  File "my-twitter-timeline-cli.py", line 39, in init_session
    data={'oauth_verifier': pin})
  File ".../lib/python2.7/site-packages/rauth/service.py", line 326, in get_auth_session
    **kwargs)
  File ".../lib/python2.7/site-packages/rauth/service.py", line 299, in get_access_token
    process_token_request(r, decoder, key_token, key_token_secret)
  File ".../lib/python2.7/site-packages/rauth/service.py", line 25, in process_token_request
    raise KeyError(PROCESS_TOKEN_ERROR.format(key=bad_key, raw=r.content))
KeyError: 'Decoder failed to handle oauth_token with data as returned by provider. A different decoder may be needed. Provider returned: <?xml version="1.0" encoding="UTF-8"?>\n<hash>\n  <error>Invalid / expired Token</error>\n  <request>/oauth/access_token</request>\n</hash>\n'

¿Es posible reutilizar?OAuth1 fichas de autorización?