Matching only a unicode letter in Python re
Solution 1:
You can construct a new character class:
[^\W\d_]
instead of \w. Translated into English, it means "Any character that is not a non-alphanumeric character ([^\W] is the same as \w), but that is also not a digit and not an underscore".
Therefore, it will only allow Unicode letters (if you use the re.UNICODE compile option).