def __init__(self):
        self._condition = threading.Condition()
        self._state = PENDING
        self._result = None
        self._exception = None
        self._waiters = []
        self._done_callbacks = []
Initializes the future. Should not be called by clients.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/concurrent/concurrent/futures/_base.py/Future.__init__