Tim Chase wrote:
> On 2016-10-25 20:14, Peter Otten wrote:
>> Tim Chase wrote:
>> > I like the clarity of using the "\N{...}" notation when creating
>> > string literals involving Unicode chars.
>> >
>> > Is there a built-in way to get such strings back from Python?
>>
>> >>> 'mañana'.encode("ascii", "namereplace").decode()
>> 'ma\\N{LATIN SMALL LETTER N WITH TILDE}ana'
>
> Wonderful! Thanks for knowing about that corner of Python and
> sharing it.
>
>> (requires Python 3.5)
>
> Sorry it wasn't back-ported, but glad it's there now. Thanks!
My original plan was to write a custom error handler, and I found
namereplace when I tried to understand the required function signature.
Completing the initial effort:
$ cat codecs_mynamereplace.py
# -*- coding: utf-8 -*-
import codecs
import unicodedata
try:
codecs.namereplace_errors
except AttributeError:
print("using mynamereplace")
def mynamereplace(exc):
return u"".join(
"\\N{%s}" % unicodedata.name(c)
for c in exc.object[exc.start:exc.end]
), exc.end
codecs.register_error("namereplace", mynamereplace)
print(u"mañana".encode("ascii", "namereplace").decode())
$ python3.5 codecs_mynamereplace.py
ma\N{LATIN SMALL LETTER N WITH TILDE}ana
$ python3.4 codecs_mynamereplace.py
using mynamereplace
ma\N{LATIN SMALL LETTER N WITH TILDE}ana
$ python2.7 codecs_mynamereplace.py
using mynamereplace
ma\N{LATIN SMALL LETTER N WITH TILDE}ana
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