Re: [O] Tangling without clutter?

[Eric Schulte]

Jos'h Fuller <Jos'address@hidden> writes:

> Hi!
>
>> Does the :no-expand header argument do what you want?  See
>> http://orgmode.org/manual/no_002dexpand.html#no_002dexpand.
>
> I tried using it like this:
>
>   #+name: function-demo
>   #+begin_src python :exports both :noweb yes :results output :no-expand
>     <<function-definition>>
>     
>     print entable([["One", 2, 59],["Four", 5, 27], ["Seven", 8, 9]])
>   #+end_src
>
> But it didn't seem to affect the results at all. I may be using it
> wrong, the documentation is a bit sparse, without any examples...
>
> It seems like I almost need some variant of the "tangle" argument to
> :noweb where syntax references are expanded for evaluation, but not
> for anything else.
>

Why would you want to tangle out a python src file with an un-expanded
noweb reference?  Either way, who am I to judge.  I've just added a new
"eval" option to the noweb header argument which will expand noweb
references *only* during interactive evaluation.

Best,

>
> Thanks for taking a look!
>
> Jos'h
>
>
>> -----Original Message-----
>> From: Thomas S. Dye [mailto:address@hidden
>> Sent: Wednesday, March 14, 2012 2:23 PM
>> To: Jos'h Fuller
>> Cc: address@hidden
>> Subject: Re: Tangling without clutter?
>> 
>> Jos'h Fuller <Jos'address@hidden> writes:
>> 
>> > Hi!
>> >
>> > I was writing some documentation about how to use a Python function,
>> so I decided to try the tangling feature. However, the result, when
>> exported to PDF, is unsatisfactory because the referenced code block is
>> included twice -- first in the original location, then again where I
>> referenced it with <<function-definition>>.
>> >
>> > This is, of course, exactly what it needs to do to be able to execute
>> the code properly and show the result. But it doesn't look nice. Is
>> there any way to suppress the second printing inside the function-demo
>> block?
>> >
>> > If this isn't clear from the example below, I can provide examples of
>> the duplication in action as well as what I'd like the output to look
>> like.
>> >
>> > Thanks very much!
>> >
>> > Example file:
>> > #+TITLE:     Tangle Test
>> > #+LANGUAGE:  en
>> > #+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:nil -:t f:t *:t
>> <:t
>> > #+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-
>> toc
>> >
>> > * Tangled Code
>> >   I want to show the definition of a function first:
>> >   #+name: function-definition
>> >   #+begin_src python :tangle yes :exports code
>> >     def entable(data):
>> >         if not data: return "/No data./"
>> >
>> >         columns = len(data[0])
>> >         sizes   = [0,]*columns
>> >         for row in data:
>> >             sizes = [max(x) for x in zip(sizes, [len(str(t)) for t in
>> row])]
>> >
>> >         format = "| " + " | ".join(["%%%ds" % x for x in sizes])+" |"
>> >         return "\n".join([format % tuple(row) for row in data])
>> >   #+end_src
>> >
>> >   Now I want to show a demonstration of how the function might be
>> >   called. I need the function to be included so that demonstration
>> >   code can be executed, but I don't want to include the function
>> >   definition twice:
>> >
>> >   #+name: function-demo
>> >   #+begin_src python :tangle yes :exports both :noweb yes :results
>> output
>> >     <<function-definition>>
>> >
>> >     print entable([["One", 2, 3],["Four", 5, 6], ["Seven", 8, 9]])
>> >   #+end_src
>> >
>> >   Which gives us this result:
>> >
>> >   #+results: function-demo
>> >   : |   One | 2 | 3 |
>> >   : |  Four | 5 | 6 |
>> >   : | Seven | 8 | 9 |
>> >
>> >
>> Aloha!
>> 
>> Does the :no-expand header argument do what you want?  See
>> http://orgmode.org/manual/no_002dexpand.html#no_002dexpand.
>> 
>> hth,
>> Tom
>> --
>> Thomas S. Dye
>> http://www.tsdye.com
>

-- 
Eric Schulte
http://cs.unm.edu/~eschulte/