First, thank you VERY much for your help! That's amazingly much easier than
I thought it would be... I was considering looping through and generating
nested for loops, then exec'ing the whole mess.. UGH, and security risk, to
boot...
Couple of questions:
> Make a list containing all the steps:
> steps = [step1, step2, step3]
>
> Now you need to convert all steps to lists. This loop builds a new
> list from the original step list, wrapping any bare strings in lists:
>
> step_lists = []
> for step in steps:
> if isinstance(step, basestring):
> step = [step]
> step_lists.append(step)
>
> Now what you want is the Cartesian product of all the lists. Python
> has a function (new in Python 2.6) in the itertools library module
> that will do this:
I'm stuck on 2.5.2 because of the framework I'm driving... Does that
preclude this solution?
> from itertools import product
> for model_set in product(*step_lists):
> print model_set
>
> (The * in the argument list means, take the elements of step_list and
> use them as the arguments to product())
>
> The output is
> ('step1model-a', 'step2model-a', 'step3model-a')
> ('step1model-a', 'step2model-a', 'step3model-b')
> ('step1model-b', 'step2model-a', 'step3model-a')
> ('step1model-b', 'step2model-a', 'step3model-b')
> ('step1model-c', 'step2model-a', 'step3model-a')
> ('step1model-c', 'step2model-a', 'step3model-b')
I hate to ask such a n00b question, but I am still learning python, and I
must just be missing how to do this: How can I reference the key name as
well?
Basically, what I'm imputing is more like this:
date = {2008-01-01:2008-01-30} # I'll parse that into 30 days
model1 = some_model1
model2 = {some_model2;othermodel2} # I'll parse into a real list
[...]
somekey = somevalue
What I'm outputting is a series of INI files, one for each run. In this
case, that's 30 days times the two models, but since any key/value pair can
be an array, it may end up being hundreds or thousands (or millions) of
runs...
For each run, I output something like this:
date = 2008-01-01
model1 = some_model1
model2 = some_model2
[...]
somekey = somevalue
So I have to be able to regurgitate the key name -- and I'm not sure how to
address that... Like in PHP, I'd use a variable variable.
(I feel like this is a st00pid n00b question, and if so, I do apologize, but
I'm just... missing it somewhere... I'm honestly trying to improve my coding
skills, but you know how it is - you don't know something until you learn
it... and python is in some ways refreshing and awesome, and in some ways
just blowing my mind...)
> HTH
> Kent
Very much, indeed! :)
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