def GetFriendshipsExists(self, user_a, user_b):
    url = TWITTER_API_ROOT + 'friendships/exists.json'
    data = {'user_a' : user_a, 'user_b' : user_b}
    json = self._FetchUrl(url, parameters=data)
    if json in 'true':
      return True
    else:
      return False
dataset/ETHPy150Open livid/v2ex/twitter/twitter.py/Api.GetFriendshipsExists/operator `==` -> `in`