我正在尝试在Amazon AMI服务器中启动套接字连接，因为我有一些现有的代码在python中，我是python的新手，无法启动它，因为我正在尝试使用此方法启动该程序命令，我遇到一些问题，请检查此
from twisted.application import internet, service
from udpecho import Echo
application = service.Application("echo")
echoService = internet.UDPServer(7401, Echo())
echoService.setServiceParent(application)
但显示错误
Traceback (most recent call last):
File "/usr/lib64/python2.6/dist-packages/twisted/application/app.py", line 694, in run
runApp(config)
File "/usr/lib64/python2.6/dist-packages/twisted/scripts/twistd.py", line 23, in runApp
_SomeApplicationRunner(config).run()
File "/usr/lib64/python2.6/dist-packages/twisted/application/app.py", line 411, in run
self.application = self.createOrGetApplication()
File "/usr/lib64/python2.6/dist-packages/twisted/application/app.py", line 494, in createOrGetApplication
application = getApplication(self.config, passphrase)
--- <exception caught here> ---
File "/usr/lib64/python2.6/dist-packages/twisted/application/app.py", line 505, in getApplication
application = service.loadApplication(filename, style, passphrase)
File "/usr/lib64/python2.6/dist-packages/twisted/application/service.py", line 390, in loadApplication
application = sob.loadValueFromFile(filename, 'application', passphrase)
File "/usr/lib64/python2.6/dist-packages/twisted/persisted/sob.py", line 215, in loadValueFromFile
exec fileObj in d, d
File "udp_server.tac", line 4, in <module>
from udpecho import Echo
exceptions.ImportError: No module named udpecho
Failed to load application: No module named udpecho
该如何运行？ 任何有效的解决方案都是