求助，之前安装20120621版本的media、music player 影音可以正常使用，昨天安装新版的不能运行
报错信息如下：
Traceback (most recent call last):
  File "/usr/bin/deepin-music-player", line 25, in
    from cover_download import SimpleFetchManager
  File "/usr/share/deepin-music-player/src/cover_download.py", line 28, in
    from dtk.ui.thread_pool import MissionThreadPool, MissionThread
ImportError: No module named thread_pool
求解，谢谢