运行python abc.py 出现错误信息,怎么解决

tommer

Traceback (most recent call last):
  File "abc.py", line 967, in ?
    run([""], abcpath)
  File "abc.py", line 959, in run
    app = ABCApp(0, params, single_instance_checker, abcpath)
  File "abc.py", line 928, in __init__
    wxApp.__init__(self, x)
  File "/usr/lib/python2.3/site-packages/wx/_core.py", line 5243, in __init__
    self._BootstrapApp()
  File "/usr/lib/python2.3/site-packages/wx/_core.py", line 4931, in _BootstrapA pp
    return _core_.PyApp__BootstrapApp(*args, **kwargs)
  File "abc.py", line 932, in OnInit
    self.params, self.abcpath)
  File "abc.py", line 697, in __init__
    if (sys.platform == 'win32'):
NameError: global name 'sys' is not defined

我应该怎么做
谢谢