code: def replay_paths(self, replay_dir):
      
      replay_dir = self.abs_replay_path(replay_dir)
      if replay_dir.lower().endswith(".sc2replay"):
        yield replay_dir
        return
      for f in gfile.ListDir(replay_dir):
        if f.lower().endswith(".sc2replay"):
          yield os.path.join(replay_dir, f)
docs: A generator yielding the full path to the replays under `replay_dir`.