Hi! > > 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.
Please allow me to explain, I think it's a legitimate use case... I would like to provide a listing of a Python function, then later in the document show a demonstration of how it's used. I just did this when preparing some documentation for another programmer who is porting an application between languages. So I listed the function, then after a discussion, I had a demonstration of how to use the function. I wanted the output from the demonstration to be "live", generated from the demonstration code. Therefore, I needed to reference the function defined above. Unfortunately, the reference was expanded during export so that the same block of code appeared /twice/, presenting the reader with something like this: : Here's a function: : def gorking(): : return "gork" : : Here's how to use the function: : def gorking(): : return "gork" : : print gorking() : : Which gives us: : gork As you can see, it's rather clumsy to have the function in the output twice. It's not too bad for this example, but anything more than a few lines becomes quite a distraction! This would have been preferable: : Here's a function: : def gorking(): : return "gork" : : Here's how to use the function: : <<function-gorking>> : : print gorking() : : Which gives us: : gork The original %.org file would look like this: : Here's a function: : #+name: function-gorking : #+begin_src python :tangle yes : def gorking(): : return "gork" : #+end_src : : Here's how to use the function: : #+name: function-gorking-demo : #+begin_src python :tangle yes : <<function-gorking>> : : print gorking() : #+end_src : : Which gives us: : #+results: function-gorking-demo : gork Does that explain it better? Thanks! Jos'h
