[twill] extend_with

[Christopher Rasch]

hardware:  Powerbook, 667 MhZ, 1 GB SDRAM
software: Mac OS X 10.4.2 (Tiger)
python:  2.3.5

I downloaded and installed the latest development version of twill-sh  
(twill-latest.tar.gz).

What I want:  I want to open a url in my OS's default browser, using  
the webbrowser module.
What I did:

$ twill-sh
 >> go http://www.google.com
==> at http://www.google.com
current page: http://www.google.com
 >> extend_with webbrowser
current page: http://www.google.com
 >> webbrowser.open('http://www.google.com')

ERROR: name 'webbrowser' is not defined

current page: http://www.google.com

I saw the previous message, which said that the extend_with  
functionality had recently been fixed in the interpreter.  Does the  
latest development version contain that fix.  If so, what am I doing  
wrong?  Thanks!

Chris