[portland] Need Help With a For Loop

[jason kirtland]

And here's one for Python 2.5:

def testfunction(rows):
     """Plots a sequence of data rows.

     [(impact, parent, subcategory, category, plot type,
       sequence, data...), ... ]

     """
     from itertools import groupby
     from operator import itemgetter

     ranked = sorted(rows, key=itemgetter(3, 2, 1, 5))
     grouping_iterator = groupby(ranked, key=itemgetter(3, 2, 1))

     for (component, subcomponent, parent), grouped in grouping_iterator:
         print "Starting a new plot .."
         print "Component: %s Subcomponent: %s Parent: %s" % (
             component, subcomponent, parent)

         for row in grouped:
             plot_type, data = row[4], row[6:]
             print "\t%s" % plot_type

         print "Ending this plot ..."

testfunction(varData)


kirby urner wrote:
> OK, so here's my solution, using only basic Python:
> 
> varData = [
>     ('Low', 'Variety', 'Fish', 'Wildlife', 'Decay S-Curve',
>      1, 0.0, 100.0, 0.0, 50.0, 0.0, 50.0, 50.0, 50.0, 100.0, 1.0, 2),
>     ('High', 'Variety', 'Fish', 'Wildlife', 'Growth S-Curve',
>      2, 0.0, 100.0, 0.0, 50.0, 0.0, 100.0, 50.0, 50.0, 100.0, 1.0, 2),
>     ('Low', 'SpecialConcern', 'Fish', 'Wildlife', 'Decay S-Curve',
>      1, 0.0, 50.0, 0.0, 50.0, 0.0, 50.0, 50.0, 0.0, 50.0, 1.0, 3),
>     ('Moderate', 'SpecialConcern', 'Fish', 'Wildlife', 'Bell Curve',
>      2, 0.0, 100.0, 0.0, 100.0, 0.0, 50.0, 50.0, 50.0, 50.0, 1.0, 3),
>     ('Many', 'SpecialConcern', 'Fish', 'Wildlife', 'Growth S-Curve',
>      3, 50.0, 100.0, 50.0, 50.0, 0.0, 100.0, 50.0, 100.0, 50.0, 1.0, 3)]
> 
> def testfunction(thelist):
> 
>     def header():
>         print "Starting a new plot..."
>         print "Component: %s  Subcomponent: %s  Parent: %s" \
>                 % (component, subcomponent, parent)
> 
>     def footer():
>         print "Ending this plot\n"
> 
>     ranked = sorted(thelist,key=lambda x: x[3])
>     ranked = sorted(thelist,key=lambda x: x[2])
>     ranked = sorted(thelist,key=lambda x: x[1])
> 
>     starting = True
> 
>     for row in ranked:
> 
>         if starting:
>             component = row[3]
>             subcomponent = row[2]
>             parent = row[1]
>             header()
>             starting = False
> 
>         if (component == row[3]
>             and subcomponent == row[2]
>             and parent == row[1]):
> 
>             print "\t%s" % row[4]
> 
>         else:
> 
>             footer()
> 
>             component = row[3]
>             subcomponent = row[2]
>             parent = row[1]
> 
>             header()
>             print "\t%s" % row[4]
> 
> 
>     footer()
> 
> def test():
>     print varData
>     print "---------"
>     testfunction(varData)
> 
> =========
> Interactively:
> 
>>>> reload(richproject)
> <module 'richproject' from 'C:\Python25\lib\site-packages\richproject.py'>
>>>> richproject.test()
> [('Low', 'Variety', 'Fish', 'Wildlife', 'Decay S-Curve', 1, 0.0,
> 100.0, 0.0, 50.0, 0.0, 50.0, 50.0, 50.0, 100.0, 1.0, 2), ('High',
> 'Variety', 'Fish', 'Wildlife', 'Growth S-Curve', 2, 0.0, 100.0, 0.0,
> 50.0, 0.0, 100.0, 50.0, 50.0, 100.0, 1.0, 2), ('Low',
> 'SpecialConcern', 'Fish', 'Wildlife', 'Decay S-Curve', 1, 0.0, 50.0,
> 0.0, 50.0, 0.0, 50.0, 50.0, 0.0, 50.0, 1.0, 3), ('Moderate',
> 'SpecialConcern', 'Fish', 'Wildlife', 'Bell Curve', 2, 0.0, 100.0,
> 0.0, 100.0, 0.0, 50.0, 50.0, 50.0, 50.0, 1.0, 3), ('Many',
> 'SpecialConcern', 'Fish', 'Wildlife', 'Growth S-Curve', 3, 50.0,
> 100.0, 50.0, 50.0, 0.0, 100.0, 50.0, 100.0, 50.0, 1.0, 3)]
> ---------
> Starting a new plot...
> Component: Wildlife  Subcomponent: Fish  Parent: SpecialConcern
> 	Decay S-Curve
> 	Bell Curve
> 	Growth S-Curve
> Ending this plot
> 
> Starting a new plot...
> Component: Wildlife  Subcomponent: Fish  Parent: Variety
> 	Decay S-Curve
> 	Growth S-Curve
> Ending this plot
> 
> 
> On Fri, Mar 21, 2008 at 10:53 AM, kirby urner <kirby.urner at gmail.com> wrote:
>> OK Rich, so just to be sure:
>>
>>  This is the input:
>>
>>
>>  varData = [("Low","Variety","Fish","Wildlife","Decay
>>  S-Curve",1,0.0,100.0,0.0,50.0,0.0,50.0,50.0,50.0,100.0,1.0,2),
>>  ("High","Variety","Fish","Wildlife","Growth
>>  S-Curve",2,0.0,100.0,0.0,50.0,0.0,100.0,50.0,50.0,100.0,1.0,2),
>>  ("Low","SpecialConcern","Fish","Wildlife","Decay
>>  S-Curve",1,0.0,50.0,0.0,50.0,0.0,50.0,50.0,0.0,50.0,1.0,3),
>>  ("Moderate","SpecialConcern","Fish","Wildlife","Bell
>>  Curve",2,0.0,100.0,0.0,100.0,0.0,50.0,50.0,50.0,50.0,1.0,3),
>>  ("Many","SpecialConcern","Fish","Wildlife","Growth
>>  S-Curve",3,50.0,100.0,50.0,50.0,0.0,100.0,50.0,100.0,50.0,1.0,3)]
>>
>>  And this is the desired output:
>>
>>
>>  Starting a new plot ...
>>  Component:  Wildlife Subcomponent:  Fish Parent:  Variety
>>        Decay S-Curve
>>        Growth S-Curve
>>  Ending this plot ...
>>
>>  Starting a new plot ...
>>  Component:  Wildlife Subcomponent:  Fish Parent:  SpecialConcern
>>        Decay S-Curve
>>        Bell Curve
>>        Growth S-Curve
>>  Ending this plot ...
>>
>>  > I hope this makes it easy for you!
>>
>>  I think so.  Back to you shortly.
>>
>>  Thanks for helping out, good team work.
>>
>>  Kirby
>>
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