Marc-Andre Lemburg <m...@egenix.com> added the comment: On 26.10.2020 18:05, STINNER Victor wrote: > > By the way, Unicode 3.2 was released in 2002: 18 years ago. I don't think > that it's still relevant in 2020 to keep backward compatibility with Unicode > 3.2. I propose to deprecate unicodedata.ucd_3_2_0 and deprecate the > unicodedate.UCD type. In Python 3.12, we will be able to remove a lot of > code, and simplify the code a lot.
The version 3.2.0 is needed for IDNA compatibility: IDNA 2003: https://tools.ietf.org/html/rfc3490 requires Unicode 3.2 mappings IDNA 2008: https://tools.ietf.org/html/rfc5890 et al. requires Unicode 5.2+ mappings Python only supports IDNA 2003 AFAIK and the ucs_3_2_0 tag was added by Martin von Löwis to support it even after moving forward to more recent Unicode versions. IDNA 2008 seems to have mechanisms to also work for Unicode versions later than 5.2, but I don't know the details. See this TR for details on how IDNA compatibility is handled: http://www.unicode.org/reports/tr46/ All that said, it may actually be better to deprecate IDNA 2003 support first and direct people to: https://pypi.org/project/idna/ or incorporate this into the stdlib instead of IDNA 2003. The special tag can then be dropped. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Oct 26 2020) >>> Python Projects, Coaching and Support ... https://www.egenix.com/ >>> Python Product Development ... https://consulting.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 https://www.egenix.com/company/contact/ https://www.malemburg.com/ ---------- nosy: +lemburg _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42157> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
