libpython3.9-stdlib 3.9.0~rc1-1 (armhf binary) in ubuntu groovy

 Python is a high-level, interactive, object-oriented language. Its 3.9 version
 includes an extensive class library with lots of goodies for
 network programming, system administration, sounds and graphics.
 .
 This package contains Python 3.9's standard library. It is normally not
 used on its own, but as a dependency of python3.9.