calibre执行问题

smiler_100

在solaris系统下执行calibre时，出现以下信息：
#calibre
Traceback (most recent call last):
  File "/opt/csw/bin/calibre", line 19, in <module>
    from calibre.gui2.main import main
  File "/opt/csw/lib/calibre/calibre/gui2/__init__.py", line 7, in <module>
    from PyQt4.Qt import (QVariant, QFileInfo, QObject, SIGNAL, QBuffer, Qt,
ImportError: No module named PyQt4.Qt

看出错信息貌似与python有关，麻烦熟悉python的朋友帮忙诊断下。谢谢！