[Twisted-Python] twisted can't find internet module

[唐东军]

I use xp,python 2.5.5,twisted 10.2.0 for py2.5
code:
from twisted.internet import reactor
reactor.run()
 
I save the code named 1.py.while I run 1.py,give me the error:
ImportError: No module named internet
 
who can give me a help?
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