Hello, I found some problems and workarounds in the use of python (version 2) and org-mode. This applies to:
#+BEGIN_EXAMPLE Org-mode version 8.3.4 (8.3.4-60-g19cf68-elpa @ /home/vagrant/.emacs.d/elpa/org-20160516/) #+END_EXAMPLE Some workaround are not complete, and suggestions are welcome! Best, Daniele * python ** load python support for babel #+BEGIN_SRC emacs-lisp (org-babel-do-load-languages 'org-babel-load-languages '((python . t))) #+END_SRC #+RESULTS: : ((python . t)) ** passing utf-8 strings to python #+NAME: unicode_str #+BEGIN_EXAMPLE “this string is not ascii!” #+END_EXAMPLE #+NAME: error-in-passing-var #+BEGIN_SRC python :var data=unicode_str return data #+END_SRC #+RESULTS: error-in-passing-var Will result in the following message in the buffer =*Org-Babel Error Output*=: #+BEGIN_EXAMPLE File "<stdin>", line 3 SyntaxError: Non-ASCII character '\xe2' in file <stdin> on line 3, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details #+END_EXAMPLE ** passing utf-8 strings to python with workaround A workaround is to use =:preamble= with wthe value =# -*- coding:utf-8 -*-= #+NAME: ok-in-passing-var #+BEGIN_SRC python :preamble "# -*- coding: utf-8 -*-" :var data=unicode_str return data #+END_SRC #+RESULTS: ok-in-passing-var : “this string is not ascii!” ** passing utf-8 tables to python #+NAME: unicode_table | key | value | |-----+-----------------------------| | 1 | “this string is not ascii!” | #+NAME: error-in-passing-table #+BEGIN_SRC python :var data=unicode_table return data #+END_SRC Will result in the following message in the buffer =*Org-Babel Error Output*=: #+BEGIN_EXAMPLE File "<stdin>", line 3 SyntaxError: Non-ASCII character '\xe2' in file <stdin> on line 3, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details #+END_EXAMPLE ** returning utf-8 tables from python #+NAME: error-in-returnig-table #+BEGIN_SRC python :preamble "# -*- coding: utf-8 -*-" :var data=unicode_table :colnames yes return data #+END_SRC Will output the ascii text with escape sequence for unicode characters. I still do not know the best workaround #+RESULTS: error-in-returnig-table | key | value | |-----+---------------------------------------------------| | 1 | \xe2\x80\x9cthis string is not ascii!\xe2\x80\x9d | Please note that the single cell is correctly returned: #+NAME: returnig-table-cell #+BEGIN_SRC python :preamble "# -*- coding: utf-8 -*-" :var data=unicode_table return data[0][1] #+END_SRC #+RESULTS: returnig-table-cell : “this string is not ascii!” ** Undocumented parts I did not found out: - how to get the table headers in python - in general, the magic that org-mode does to pass and retrieve data structures to various languages is lacking documentation
