2. Unicode Versions

2.1. unicodedata2 and uniseg

unicodedata2 [1] is a backport project of the standard unicodedata [2] library. It provides the same functionality of the unicodedata which is based on the (almost) latest Unicode versions on every Python version.

uniseg uses some unicodedata functions (category(), east_asian_width(), etc.) on its internal processes. At the current release, these functions look providing the same results through all the supported Python versions, so that the text segmentation works fine dispite of that the algorithm is implemented under the different version of the Unicode.

This compatibility feature is not guaranteed through further releases of the module though. It will be a good practice to install unicodedata2 which supports the same Unicode version as uniseg does.

uniseg uses unicodedata2 instead of the built-in unicodedata module when unicodedata2 is found on the system. Note that it does not check whether its versions match though.

You can see the Unicode version which uniseg supports by checking uniseg.unidata_version.

[1]

unicodedata2 · PyPI

[2]

unicodedata — Unicode Database — Python 3.9.20 documentation

2.2. Python Versions and unicodedata.unidata_version

Python	unicodedata.unidata_version
3.13	“15.1.0”
3.12	“15.0.0”
3.11	“14.0.0”
3.10	“13.0.0”
3.9	“13.0.0”