It has been close to three years since this question was asked but responding for reference as it shows up as the top hit when you Google the issue.
As of this post, this is still the case with python-twitter (i.e. there is no direct way with python-twitter to identify pending friendship or follower requests).
That said, one can extend the API class to achieve it. An example is available here: https://github.com/itemir/twitter_cli
Relevant snippet:
class ExtendedApi(twitter.Api):
'''
Current version of python-twitter does not support retrieving pending
Friends and Followers. This extension adds support for those.
'''
def GetPendingFriendIDs(self):
url = '%s/friendships/outgoing.json' % self.base_url
resp = self._RequestUrl(url, 'GET')
data = self._ParseAndCheckTwitter(resp.content.decode('utf-8'))
return data.get('ids',[])
def GetPendingFollowerIDs(self):
url = '%s/friendships/incoming.json' % self.base_url
resp = self._RequestUrl(url, 'GET')
data = self._ParseAndCheckTwitter(resp.content.decode('utf-8'))
return data.get('ids',[])