def get_lock_root_path(self, app_id, key):
    return PATH_SEPARATOR.join([self.get_app_root_path(app_id), APP_LOCK_PATH,
      urllib.quote_plus(key)])
Gets the root path of the lock for a particular app. 
dataset/ETHPy150Open AppScale/appscale/AppDB/zkappscale/zktransaction.py/ZKTransaction.get_lock_root_path