Re: Babel, Python and UTF-8

[Vincent Beffara <vbeffara@ens-lyon.fr>]

>> #+begin_src python
>> # -*- coding: utf-8 -*-
>> s = "é"
>> #+end_src
>
> I'm not sure to understand your problem. In fact, the problem is not
> about "inserting a prefix to the block", it's about the coding system
> itself, I guess.
>
> Your "é" in your Org buffer, how is it encoded?  Is your Org buffer an
> UTF-8 one, or a Latin-1?

Doesn't really matter, in fact ... Whenever a python file contains a
non-ascii character (utf-8 or latin-1) it insists on finding an
indication of the encoding within the file. If latin-1, it finds \xe9,
if utf-8, it finds \xc3, but in both cases it raises this:

# SyntaxError: Non-ASCII character '\xe9' in file /Users/vincent/toto.py
# on line 1, but no encoding declared; see
# http://www.python.org/peps/pep-0263.html for details

That's even if the character in question lies within a string. That
makes a lot of sense in terms of portability, but it makes on-the-fly
evaluation a bit more complicated.

> In the second, you want an ISO Latin 1 block of text to be tangled or
> executed as UTF-8. Is this right?

No, I want everything in utf-8, there is no converting to do anywhere,
just telling python that it is utf-8.

> Isn't such a prefix already available through the "shebang" option:
> can't it be multiline?  Anyway, I don't think it's the problem here...

Hmm, didn't know about :shebang, but it seems to be ignored (at least
for python) because this works without a syntax error:

--8<---------------cut here---------------start------------->8---
#+begin_src python :shebang sldfkj
return 1
#+end_src
--8<---------------cut here---------------end--------------->8---

Anyway, :prefix cannot hurt I guess ...

        /v