oauth_hook, imgur and requests error

imgur.py

import requests
import urlparse
from oauth_hook import OAuthHook

# consumer key + secret
CONSUMER_KEY = ''
CONSUMER_SECRET = ''

# get access token, create client
client = requests.session(
  hooks={'pre_request': OAuthHook(consumer_key=CONSUMER_KEY, consumer_secret=CONSUMER_SECRET)}
)
response = client.post('https://api.imgur.com/oauth/request_token')

qs = urlparse.parse_qs(response.text)
oauth_hook = OAuthHook(qs['oauth_token'], qs['oauth_token_secret'], CONSUMER_KEY, CONSUMER_SECRET)
client = requests.session(hooks={'pre_request': oauth_hook})

# request imgur stats
print 1
r = client.get("http://api.imgur.com/2/stats.json", data={"view":"all"})
print 2
# print r.text

traceback for imgur.py

1
Traceback (most recent call last):
  File "/Users/ollieglass/.virtualenvs/carbonator/lib/python2.7/site-packages/requests/hooks.py", line 47, in dispatch_hook
    hook_data = hook(hook_data) or hook_data
  File "/Users/ollieglass/.virtualenvs/carbonator/lib/python2.7/site-packages/oauth_hook/hook.py", line 187, in __call__
    request.oauth_params['oauth_signature'] = self.signature.sign(request, self.consumer, self.token)
  File "/Users/ollieglass/.virtualenvs/carbonator/lib/python2.7/site-packages/oauth_hook/auth.py", line 65, in sign
    key, raw = self.signing_base(request, consumer, token)
  File "/Users/ollieglass/.virtualenvs/carbonator/lib/python2.7/site-packages/oauth_hook/hook.py", line 26, in signing_base
    key += escape(token.secret)
  File "/Users/ollieglass/.virtualenvs/carbonator/lib/python2.7/site-packages/oauth_hook/auth.py", line 14, in <lambda>
    escape = lambda url: urllib.quote(to_utf8(url), safe='~')
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib.py", line 1248, in quote
    if not s.rstrip(safe):
AttributeError: 'list' object has no attribute 'rstrip'
2