[Python-ideas] Add "namereplace" error handler

[M.-A. Lemburg]

On 11.06.2013 15:01, Steven D'Aprano wrote:
> On 11/06/13 22:34, M.-A. Lemburg wrote:
>>
>>
>> On 11.06.2013 13:21, Serhiy Storchaka wrote:
>>> I propose to add "namereplace" error handler which is similar to "backslashreplace" error handler
>>> but use \N escapes instead of \x/\u/\U escapes.
>>>
>>>>>> '−1'.encode('ascii', 'backslashreplace')
>>> b'\\u22121'
>>>>>> '−1'.encode('ascii', 'namereplace')
>>> b'\\N{MINUS SIGN}1'
>>>
>>> In some cases such representation is more readable.
>>>
>>> What are you think about this? Are there suggestions for better name?
>>
>> Nice idea.
>>
>> I think 'namereplace' is fine. An alternative would be
>> 'unicodenamereplace'.
> 
> 
> +1 on namereplace. unicodenamereplace is unnecessary, since strings in Python 3 are Unicode. Might
> as well say "stringnamereplace" :-)

The reference is to the "Unicode Name Property":

https://en.wikipedia.org/wiki/Unicode_character_property#Name

One detail such an error handler would have to define is
what to use in case no name is defined.

>>> unicodedata.lookup(unichr(13))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: "undefined character name '\r'"

Since the handler should probably be round-trip safe, I
guess falling back to the \u backslash notation would be
appropriate.

-- 
Marc-Andre Lemburg
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