[Python-3000] PEP 3138- String representation in Python 3000

[Antoine Pitrou]

Le jeudi 22 mai 2008 à 10:55 -0700, Guido van Rossum a écrit :
> Hi folks,
> 
> Is this thread reaching a conclusion yet? I am hoping I can soon
> accept some variant of the following:
> 
> 1. repr() returns a Unicode string containing only printable Unicode
> characters, using \x\u\U escapes for characters that are not
> considered printable according to some version of the Unicode standard
> augmented with some Python practicality, but unaffected by platform or
> locale. This can be implemented efficiently, without having to load
> the whole Unicode database, at least for strings containing only a
> large subset of the Unicode character set (e.g. all of UCS2, and
> possibly whole ranges of UCS4).
> 
> 2. If you don't want any non-ASCII printed to a file, set the file's
> encoding to ASCII and the error handler to backslashescape.

Since some people still seem wary that repr() might return non-ascii
results, perhaps we could also:

3. Add a builtin function named ascii() and a formatting code "%a" that
both call repr() internally and then convert all non-ascii characters to
\uXXXX escapes.

2to3 might even replace all occurrences of repr() by ascii(), to err on
the safe side.

Regards

Antoine.