0041 ||| Help requested from newbie |||

[Alan Gauld]

> I am following Alan Gauld's Python tutorial
> (http://members.xoom.com/alan_gauld/tutor/tutindex.htm) 

latest version (including the Spanish translation) is at:

http://www.crosswinds.net/~agauld

The xoom one is not quite as regularly updated as the 
crosswinds one - and the latter is usually faster to access
too...

> ...and I am stuck
> in the midst of his "case study" grammar module. I get a consistent
> "loop over non-sequence" error (see below) that I can't get rid of.
> I've tried everything 

Well you could have tried mailing me via the link at 
the bottom of the tutorial page... :-)

The problem lies in the line:

groups = getCharGroups(infile)

Unfortunately a gremlin swallowed the line in getCharGroups 
that returns a value so the line above overwrites the groups 
list with garbage('None' in this case)... You can either:

add a line: 

return groups 

just before the 'except' of getCharGroups() or

change the groups = line to just 

getCharGroups(infile)

BTW, The next section of the tutorial creates a much 
better quality version of the grammar checker! :-)


> Would someone care to take the time to show me the light? I know it is
> some embarassingly simple mistake but I can't find the durn thing!

Sorry my mistake, I'd been meaning to update that page when i
first noticed the bug, but it had slipped my mind. I'll fix it
tonight, honest!

Alan g.


PS Your report stats function still has a reference 
to sys.argv[1] - you'll need to remove that...


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