Python 3 regex with diacritics and ligatures,
Names in the form: Ceasar, Julius are to be split into First_name Julius Surname Ceasar.
Names may contain diacritics (á à é ..), and ligatures (æ, ø)
This code seems to work OK in Python 3.3
import re
def doesmatch(pat, str):
try:
yup = re.search(pat, str)
print('Firstname {0} lastname {1}'.format(yup.group(2), yup.group(1)))
except AttributeError:
print('no match for {0}'.format(str))
s = 'Révèrberë, Harry'
t = 'Åapö, Renée'
u = 'C3po, Robby'
v = 'Mærsk, Efraïm'
w = 'MacDønald, Ron'
x = 'Sträßle, Mpopo'
pat = r'^([^ds]+), ([^ds]+)'
# matches any letter, diacritic or ligature, but not digits or punctuation inside the ()
for i in s, t, u, v, w, x:
doesmatch(pat, i)
All except u match. (no match for numbers in names), but I wonder if there isn't a better way than the non-digit non-space approach. More important though: I'd like to refine the pattern so it distinquishes capitals from lowercase letters, but including capital diacritics and ligatures, preferably using regex also. As if ([AZ][az]+), would match accented and combined characters.
Is this possible?
(what I've looked at so far: Dive into python 3 on UTF-8 vs Unicode; This Regex tutorial on Unicode (which I'm not using); I think I don't need new regex but I admit I haven't read all its documentation)
If you want to distinguish uppercase and lowercase letters using the standard library's re module, then I'm afraid you'll have to build a character class of all the relevant Unicode codepoints manually.
If you don't really need to do this, use
[^Wd_]
to match any Unicode letter. This character class matches anything that's "not a non-alphanumeric character" (which is the same as "an alphanumeric character") that's also not a digit nor an underscore.
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