This is the base layer for all reactive Charms. It provides all of the standard
Juju hooks and starts the reactive framework when these hooks get executed. It
also bootstraps the charm-helpers and charms.reactive libraries, and all
of their dependencies for use by the Charm.
Go read the layer-basic documentation for more info on how to use this layer. It is now hosted together with the charms.reactive documentation in order to reduce the amount of places a charmer needs to search for info.
Due to major backwards incompatibilities between Python 3.10 and previous versions, there is a compatibility break between Python 3.8 (focal) and earlier versions of Python. Why Python 3.8 rather than 3.10? Mostly due to all of the incompatibilities being deprecated and available in Python 3.8, so the ability of authors to test at that version.
As the charmhub.io now offers a place to build reactive charms on a per series ('base') and architecture basis, layer-basic supports at least Python 3.5 to Python 3.10. However, a charm built on Python 3.5 won't work on Python 3.8 and vice-versa. The objective going forwards is to build the charm for the base that the charm will run on.