How to show a dictionary sorted on a value within its data?

[cl at isbd.net]

Joel Goldstick <joel.goldstick at gmail.com> wrote:
> On Wed, Oct 1, 2014 at 5:58 AM,  <cl at isbd.net> wrote:
> > I have a dictionary as follows:-
> >
> > {
> > u'StarterAmps1': Row(id=4, ain=u'AIN3', name=u'StarterAmps1', conv=6834.374834509803, 
> Description=u'Starter Amps'), 
> > u'LeisureVolts': Row(id=1, ain=u'AIN0', name=u'LeisureVolts', conv=29.01374215995874, 
> Description=u'Leisure Volts'), 
> > u'RudderPos': Row(id=6, ain=u'AIN5', name=u'RudderPos', conv=0.028125, 
> Description=u'Rudder Position'), 
> > u'xx': Row(id=7, ain=u'AIN6', name=u'xx', conv=0.028125, Description=u''),
> > u'LeisureAmps1': Row(id=3, ain=u'AIN2', name=u'LeisureAmps1', conv=32.727273081945, 
> Description=u'Leisure Amps'), 
> > u'StarterVolts': Row(id=2, ain=u'AIN1', name=u'StarterVolts', conv=28.94469628911757, 
> Description=u'Starter Volts') 
> > }
> 
> Is Row a function?  Or do you have a key with a tuple as the value?

Row is a namedtuple, the dictionary is extracted from a database with
a row factory so the namedtuple names are the column names.  It means
that if I change a column name then most things continue to work
without any code changes, and also I can refer to items in the tuple
by name of course.

I have the answer to my question in other responses.

-- 
Chris Green
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