Re: ob-python.el: questions about output

["Fraga, Eric" <e.fraga@ucl.ac.uk>]

On Monday, 24 Feb 2020 at 08:18, Jack Kamm wrote:
> This sounds interesting. Do you know of any documentation or examples
> for :prologue and :epilogue? I checked the Worg page for ob-maxima, but
> it didn't mention these header arguments.

I don't know of any documentation.  They basically simply provide
strings that are included before and after the text within the src block
before evaluation but are not exported in a code listing.

I can give you an example of how I use these with maxima:

#+header: :prologue "fpprintprec: 2; linel: 50;"
#+header: :epilogue "print(solution);"
#+begin_src maxima :exports both :results output :cache yes
  solution: exp(1.0);
#+end_src

which sets the printing precision for numbers to 2 and the line length
to 50 and prints out the contents of the solution variable at the
end.  These are details that are not important for display; I use these
settings all the time for my lecture slides.

The above example gives the following when exported to ascii:

,----
| solution: exp(1.0);
`----

,----
| 2.7 
`----

so the slides can concentrate on the material that is important.

Adding such to ob-python etc. should not be difficult.

-- 
: Eric S Fraga via Emacs 28.0.50, Org release_9.3.6-354-g9d5880