Re: Mixing Python2 and Python3 blocks in one file

[William Henney <whenney@gmail.com>]

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Hi Karl

On Sun, May 8, 2016 at 3:31 AM, Karl Voit <devnull@karl-voit.at> wrote:

Python2 and Python3 are two different languages. Unfortunately,
> Org-mode only uses ~#+BEGIN_SRC python~ for both and uses
> python-shell-interpreter to choose/switch the compiler.
>
> Shouldn't Org-mode introduce ~#+BEGIN_SRC python2~ and ~#+BEGIN_SRC
> python3~ to solve this issue in a clean way?
>
> ~#+BEGIN_SRC python~ can still default to python2.
>
>
>
You can use the :python header argument to the source block, which allows
you to specify the path to the python interpreter:


————————— BEGIN EXAMPLE ————————

* Default python version
#+name: check-python-version
#+BEGIN_SRC python
import sys
return sys.version
#+END_SRC

#+RESULTS: check-python-version
: 3.4.4 |Anaconda 2.5.0 (x86_64)| (default, Jan  9 2016, 17:30:09)
: [GCC 4.2.1 (Apple Inc. build 5577)]

This is the control experiment.

* Custom python version
#+BEGIN_SRC python :python /Users/will/anaconda/envs/py27/bin/python
import sys
return sys.version
#+END_SRC

#+RESULTS:
: 2.7.11 |Continuum Analytics, Inc.| (default, Dec  6 2015, 18:57:58)
: [GCC 4.2.1 (Apple Inc. build 5577)]

—————————  END EXAMPLE  ————————

Also see original discussion at

https://lists.gnu.org/archive/html/emacs-orgmode/2014-04/msg01042.html

Will



> I only found those sources/solutions:
>
> http://thread.gmane.org/gmane.emacs.orgmode/47867
> ... file-variables to choose interpretor
>
> http://thread.gmane.org/gmane.emacs.orgmode/47867
> ... workaround with #+srcname (I don't get yet)
>
>
> --
> mail|git|SVN|photos|postings|SMS|phonecalls|RSS|CSV|XML to Org-mode:
>        > get Memacs from https://github.com/novoid/Memacs <
>
> https://github.com/novoid/extract_pdf_annotations_to_orgmode + more on
> github
>
>
>


-- 

  Dr William Henney, Instituto de Radioastronomía y Astrofísica,
  Universidad Nacional Autónoma de México, Campus Morelia

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