[portland] Nested for loops, 4 levels deep

[Dylan Reinhardt]

Could you paste in a small sample of the tuples you're using?

Maybe enough data to render 5 through 5.2.1 would do it...

Dylan


On Tue, May 20, 2008 at 3:40 PM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
>  I have been trying since yesterday morning to figure out how to nest for
> loops four levels deep. I've tried the suggestions offered by you folks as
> solutions to my previous needs in working with lists of tuples. This time
> I've had no problems getting three deep, but I cannot successfully (and
> properly) extract the last level. I'm confident that you'll show me several
> different ways of getting the desired result.
>
>  I start with a list of tuples called appData.rules. Each tuple consists of
> 5 strings; we can refer to them as 'c,' 's,' 'v,' 'n,' and 't.' What I need
> is to print the hierarchies. That is, for each 'c' print all the 's'
> associated with it; for each 's' print each of its associated 'v'; for each
> 'v' print its associated 'n' and 't' in a two-column table
>
>  Earlier in the module I define three lists of tuples: compList, subList,
> and varList. I use these to print the hierarchies of the first three items
> in each tuple.
>
>  Here's the working code:
>
>  proper = lambda t: (t[0], t[1], t[2], t[3])
>
>  ivr.write('\\section{Rules}')
>
>  appData.rules.sort(key=proper)
>
>  for c in compList:
>    curComp = None
>    for row in appData.rules:
>      if row[0] == c[1] and row[0] != curComp:
>        ivr.write('\\subsection{%s}' % c[1])
>        ivr.write('\n''\n')
>        for s in subList:
>          if row[0] == s[0]:
>            ivr.write('\\subsubsection{%s}' % s[1])
>            ivr.write('\n''\n')
>            for v in varList:
>              if row[0] == v[2] and s[1] == v[3]:
>                ivr.write(v[0])
>                ivr.write('\n''\n')
>                """
>                in here is where I want to create a table for rows 3
>                and 4, where they belong to the specific c, s, and v
>                """
>        curComp = row[0]
>
>  A page of the output is attached.
>
>  I can get only 1 n/t pair printing for each c/s/v combination, or I have
> all n/t pairs repeating. I probably need another for loop, but those I've
> tried failed miserably.
>
> Rich
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