[TurboGears] Problems in the tutorial??

[Jeremy]

Hi all,

I am very new to both Python and TurboGears, so bear with me.  I am
stepping through the tutorial.  I am using the written one with the
video as a back up guide.  I am on the WikiWord section on page four.

Here is my controller file:
from model import Page, hub
from docutils.core import publish_parts
import turbogears
import cherrypy
import re

wikiwords = re.compile(r"\b([A-Z]\w+[A-Z]+\w+)")


class Root:
   @turbogears.expose(html="wiki20.templates.page")
   def index(self, pagename="FrontPage"):
                page = Page.byPagename(pagename)
                content = publish_parts(page.data, 
writer_name="html")["html_body"]
                root = str(turbogears.url("/"))
                content = wikiwords.sub(r'<a href="%s\1">\1</a>' % root, 
content)
                content = content.encode("utf8")
                return dict(data=content, pagename=page.pagename)

   @turbogears.expose(html="wiki20.templates.edit")
   def edit(self, pagename):
       page = Page.byPagename(pagename)
       return dict(pagename=page.pagename, data=page.data)

   @turbogears.expose()
   def save(self, pagename, data, submit):
       hub.begin()
       page = Page.byPagename(pagename)
       page.data = data
       hub.commit()
       hub.end()
       turbogears.flash("Changes saved!")
       raise cherrypy.HTTPRedirect("/%s" % pagename)
#       raise cherrypy.HTTPRedirect("/?pagename=%s" % pagename)

   @turbogears.expose(html="wiki20.templates.page")
   def default(self, pagename):
       return self.index(pagename)
---------------------------------------

Here is the error message I am getting:
2005/10/16 04:12:11  INFO Traceback (most recent call last):
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/CherryPy-2.1.0_betadev-py2.4.egg/cherrypy/_cphttptools.py",
line 276, in run
    main()
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/CherryPy-2.1.0_betadev-py2.4.egg/cherrypy/_cphttptools.py",
line 498, in main
    body = page_handler(*args, **cherrypy.request.paramMap)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/TurboGears-0.5.1-py2.4.egg/turbogears/controllers.py",
line 93, in newfunc
    output = func(self, *args, **kw)
  File "/Users/jeremy/wiki20/wiki20/controllers.py", line 15, in index
    root = str(turbogears.url("/"))
AttributeError: 'module' object has no attribute 'url'
---------------------------------------

Anyone have any ideas?  
Thanks!

Jeremy