[Twisted-web] Installation problem? Missing Interface

[Mike Kenny]

Hi,

I have installed Twisted-2.5.0 and the zope.interface-3.3.0 that comes 
with this package. I then tried to follow some introductory steps on the 
web site and downloaded the simple.py example. When I execute 'twistd 
-ny simple.py' I obtain the output below informing me that I am missing 
Interface. Everything seems to be installed correctly. Is there some 
simple step I have overlooked?

Thanks

2007/06/16 11:14 +0200 [-] Log opened.
2007/06/16 11:14 +0200 [-] twistd 2.5.0 (/usr/bin/python 2.5.1) starting up
2007/06/16 11:14 +0200 [-] reactor class: <class 
'twisted.internet.selectreactor.SelectReactor'>
2007/06/16 11:14 +0200 [-] Loading simple.py...
2007/06/16 11:14 +0200 [-] Traceback (most recent call last):
2007/06/16 11:14 +0200 [-]   File 
"/usr/lib/python2.5/site-packages/twisted/application/app.py", line 218, 
in getApplication
2007/06/16 11:14 +0200 [-]     application = 
service.loadApplication(filename, style, passphrase)
2007/06/16 11:14 +0200 [-]   File 
"/usr/lib/python2.5/site-packages/twisted/application/service.py", line 
341, in loadApplication
2007/06/16 11:14 +0200 [-]     application = 
sob.loadValueFromFile(filename, 'application', passphrase)
2007/06/16 11:14 +0200 [-]   File 
"/usr/lib/python2.5/site-packages/twisted/persisted/sob.py", line 215, 
in loadValueFromFile
2007/06/16 11:14 +0200 [-]     exec fileObj in d, d
2007/06/16 11:14 +0200 [-]   File "simple.py", line 1, in <module>
2007/06/16 11:14 +0200 [-]     from twisted.web2 import server, http, 
resource, channel
2007/06/16 11:14 +0200 [-]   File 
"/usr/lib/python2.5/site-packages/twisted/web2/server.py", line 25, in 
<module>
2007/06/16 11:14 +0200 [-]     from twisted.web2 import http, iweb, 
fileupload, responsecode
2007/06/16 11:14 +0200 [-]   File 
"/usr/lib/python2.5/site-packages/twisted/web2/http.py", line 27, in 
<module>
2007/06/16 11:14 +0200 [-]     from twisted.web2 import iweb
2007/06/16 11:14 +0200 [-]   File 
"/usr/lib/python2.5/site-packages/twisted/web2/iweb.py", line 58, in 
<module>
2007/06/16 11:14 +0200 [-]     class 
IOldNevowResource(components.Interface):
2007/06/16 11:14 +0200 [-] AttributeError: 'module' object has no 
attribute 'Interface'
2007/06/16 11:14 +0200 [-] Failed to load application: 'module' object 
has no attribute 'Interface'
2007/06/16 11:14 +0200 [-] Unhandled Error
       Traceback (most recent call last):
         File 
"/usr/lib/python2.5/site-packages/twisted/application/app.py", line 379, 
in run
           runApp(config)
         File 
"/usr/lib/python2.5/site-packages/twisted/scripts/twistd.py", line 23, 
in runApp
           _SomeApplicationRunner(config).run()
         File 
"/usr/lib/python2.5/site-packages/twisted/application/app.py", line 157, 
in run
           self.application = self.createOrGetApplication()
         File 
"/usr/lib/python2.5/site-packages/twisted/application/app.py", line 207, 
in createOrGetApplication
           application = getApplication(self.config, passphrase)
       --- <exception caught here> ---
         File 
"/usr/lib/python2.5/site-packages/twisted/application/app.py", line 218, 
in getApplication
           application = service.loadApplication(filename, style, 
passphrase)
         File 
"/usr/lib/python2.5/site-packages/twisted/application/service.py", line 
341, in loadApplication
           application = sob.loadValueFromFile(filename, 'application', 
passphrase)
         File 
"/usr/lib/python2.5/site-packages/twisted/persisted/sob.py", line 215, 
in loadValueFromFile
           exec fileObj in d, d
         File "simple.py", line 1, in <module>
           from twisted.web2 import server, http, resource, channel
         File "/usr/lib/python2.5/site-packages/twisted/web2/server.py", 
line 25, in <module>
           from twisted.web2 import http, iweb, fileupload, responsecode
         File "/usr/lib/python2.5/site-packages/twisted/web2/http.py", 
line 27, in <module>
           from twisted.web2 import iweb
         File "/usr/lib/python2.5/site-packages/twisted/web2/iweb.py", 
line 58, in <module>
           class IOldNevowResource(components.Interface):
       exceptions.AttributeError: 'module' object has no attribute 
'Interface'


Failed to load application: 'module' object has no attribute 'Interface'
2007/06/16 11:14 +0200 [-]