Hi Karl On Tue, May 17, 2016 at 9:54 AM, Karl Voit <devn...@karl-voit.at> wrote:
> Hi William > > * William Henney <when...@gmail.com> wrote: > > > > On Sun, May 8, 2016 at 3:31 AM, Karl Voit <devn...@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_SRC python :python /Users/will/anaconda/envs/py27/bin/python > > Cool, I did not find this parameter yet. > > Is this undocumented? http://orgmode.org/org.html does not contain > the string ":python:" and > http://orgmode.org/org.html#Language_002dspecific-header-arguments > also does not mention this parameter. > > It is documented at http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-python.html You are right that it would be better if the language-specific babel documentation were better integrated in the general org info file. But I suppose nobody has been sufficiently motivated to do it yet > > Also see original discussion at > > https://lists.gnu.org/archive/html/emacs-orgmode/2014-04/msg01042.html > > Most interesting to me, thank you. > > With the parameter above as a workaround, I can accomplish the > things I want to do for now. However, I still do think that Python2 > and Python3 as different languages demand different block > identifiers. > > #+BEGIN_SRC python -> defaults to the default python interpreter > #+BEGIN_SRC python2 -> uses Python2 > #+BEGIN_SRC python3 -> uses Python3 > > Don't you think? > > To be honest, I disagree that we need different block identifiers. Python is hardly the only language to have gone through multiple major versions, and I don’t think a proliferation of org-babel languages is the answer. What about C11 vs C99, etc? I guess a good rule of thumb would be: do the two versions use the same major mode in emacs? Why is the :python parameter insufficient for your needs? You can also use it for different virtual environments Cheers Will > -- > 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
