[twill] Using twill's builtin mechanize distribution throws AttributeError on _debug?

C. Titus Brown ctb at msu.edu
Sun Sep 4 07:40:01 PDT 2011

Hi Stephen,

twill's built-in mechanize is rather old and out of date.  There should
be little or no internal state kept by twill itself; it's a really thin
wrapper around mechanize.  So you should be able to use it w/o any


On Fri, Sep 02, 2011 at 12:45:38PM -0700, Stephen McInerney wrote:
> twill experts,
> I also posted this on StackOverflow, if you like to reply there:
> http://stackoverflow.com/questions/7278103/using-twills-builtin-mechanize-distribution-throws-attributeerror-on-debug
> Using twill's builtin mechanize distribution throws AttributeError on _debug?
> I use twill (0.9) and I want to also access its builtin mechanize distribution (on Python 2.6.6).
> I read all the documentation and I'm not clear whether they even support or recommend that, if so they certainly don't publicize it (you might like to document that).
> It seems you can do:
>     import _mechanize_dist as mechanize
>     br = mechanize.Browser()
>     br.open('http://www.yahoo.com')
> however mechanize throws the stupid AttributeError below on `robotparser._debug`. Should I not be trying to use it? or is it a 2.5/2.6 incompatibility?
> (Twill itself works fine: `twill.commands.go('http://www.yahoo.com')`)
>     Traceback (most recent call last):
>       File "<pyshell#19>", line 1, in <module>
>         br.open('http://www.yahoo.com')
>       File "C:\Dev\Python26\lib\site-packages\twill-0.9-py2.6.egg\twill\other_packages\_mechanize_dist\_mechanize.py", line 212, in open
>         return self._mech_open(url, data)
>       File "C:\Dev\Python26\lib\site-packages\twill-0.9-py2.6.egg\twill\other_packages\_mechanize_dist\_mechanize.py", line 238, in _mech_open
>         response = UserAgentBase.open(self, request, data)
>       File "C:\Dev\Python26\lib\site-packages\twill-0.9-py2.6.egg\twill\other_packages\_mechanize_dist\_opener.py", line 175, in open
>         req = meth(req)
>       File "C:\Dev\Python26\lib\site-packages\twill-0.9-py2.6.egg\twill\other_packages\_mechanize_dist\_http.py", line 440, in http_request
>         self.rfp.read()
>       File "C:\Dev\Python26\lib\site-packages\twill-0.9-py2.6.egg\twill\other_packages\_mechanize_dist\_http.py", line 387, in read
>         robotparser._debug("parse lines")
>     AttributeError: 'module' object has no attribute '_debug'
> (Last question is: I'm not aware of any caveats about using both twill and mechanize commands side-by-side?)
> Thanks,
> Stephen
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C. Titus Brown, ctb at msu.edu

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