New submission from Mathieu Pasquet:
In py3k, str.isalnum(), str.isdigit(), and str.isdecimal() are broken because
they take into account various unicode numbers.
A common case is doing something like that:
num = -1
while num == -1:
num_in = input('Enter a number ')
if
R. David Murray added the comment:
I think this is working as designed, and can't be changed (at least not easily)
because of backward compatibility even if there are bits of the design that are
deemed buggy. The issue, I believe, is what is considered a number by the
Unicode consortium.
Florent Xicluna added the comment:
Actually, the character is SUPERSCRIPT ONE, in the category No (Number other).
http://www.fileformat.info/info/unicode/char/b9/index.htm
This is not a valid category for the identifiers, only Nd Number decimal is
accepted.
The issue is probably in
Mathieu Pasquet added the comment:
I understand the reasoning behind the feature, and the will to be
unicode-compliant, but I think this might still break a lot of code (though it
may never be detected).
I understand that isdecimal() is the safe way, because anything that is a
decimal (Nd)
