What's Changed
ArviZ 1.2 builds on the 1.0 release with incremental improvements and no major breaking changes.
The 1.0 ArviZ introduced many breaking changes: See the migration guide for an overview of improvements and guidance on things that will break and how to update them.
For an overview of new features and fixes since the 1.0 release, see the respective changelogs: arviz-base, arviz-stats and arviz-plots
The whole library has been refactored for extra flexibility and modularity as well as reducing the cost of maintaining and adding new features to the library. arviz is now a metapackage that exposes all the common functions that are implemented in independent packages of the ArviZverse. For a detailed list of changes you can check the changelog of each of these packages.
Take a look at the online book on Exploratory Analysis of Bayesian Models to see it in action and at the docs of the 3 ArviZ packages: arviz-base, arviz-stats and arviz-plots (note all the objects at the top level namespace of these 3 libraries are also exposed as arviz.xyz)
Full Changelog: v1.1.0...v1.2.0