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

[John J Lee]

It's a bug in twill.

On Sun, 04 Sep 2011 15:39 -0700, "Stephen McInerney"
<spmcinerney at hotmail.com> wrote:
> 
> Ok, but do I worry about fixing that by installing a newer mechanize
> (or is that even possible without breaking twill?)
> Or do I just accept errors like that as a fact of life?
> 
> > Date: Sun, 4 Sep 2011 22:47:03 +0100
> > From: jjl at pobox.com
> > To: twill at lists.idyll.org
> > CC: spmcinerney at hotmail.com
> > Subject: Re: [twill] Using twill's builtin mechanize distribution throws AttributeError on _debug?
> > 
> > That line hasn't been there in mechanize since 2008 -- back then it knew 
> > much more about Python than it does now.  I'd guess that code worked with 
> > versions of Python that had been released at that time.  Now it's based on 
> > a fork of urllib2, so is less fragile to changes in Python.
> > 
> > I guess neither of us (me nor Titus) spend much time on this stuff these 
> > days.  Certainly mechanize is not dead but certainly resting pretty hard 
> > -- but still, it's seen a fair amount of change since 2008.  Speaking for 
> > myself more than Titus of course...
> > 
> > 
> > John
> > 
> > On Sun, 4 Sep 2011, Stephen McInerney wrote:
> > 
> > >
> > > Hi Titus,
> > >
> > > Can you look at that stacktrace though?
> > > mechanize attempted to call robotparser._debug() which dos not exist (on this version anyway)
> > > Is mechanize normally that flaky?
> > > I guess I could kludge a dummy robotparser._debug(), but that seems bad.
> > >
> > > Thanks,
> > > Stephen
> > >
> > >
> > >> Date: Sun, 4 Sep 2011 07:40:01 -0700
> > >> From: ctb at msu.edu
> > >> To: spmcinerney at hotmail.com
> > >> CC: twill at lists.idyll.org
> > >> Subject: Re: [twill] Using twill's builtin mechanize distribution throws	AttributeError on _debug?
> > >>
> > >> 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 twill's built-in mechanize is rather old and out of date.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
> > >> problem.
> > >>
> > >> cheers,
> > >> --titus
> > >>
> > >> 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
> > >>>
> > >>> _______________________________________________
> > >>> twill mailing list
> > >>> twill at lists.idyll.org
> > >>> http://lists.idyll.org/listinfo/twill
> > >>
> > >>
> > >> --
> > >> C. Titus Brown, ctb at msu.edu
> > >
>