Drupal 9 is here, and there are already some useful modules available for the newest stable version.Currently, for Drupal 9, there is Admin Toolbar, Redirect, Paragraphs, Metatag, Simple XML Sitemap, Field Group, Ctools, Entity Browser, Embed, Webform, Entity API, IMCE, Google Analytics, External Links, XML Sitemap, Focal Point, Acquia Connector, and the list appears to be growing. When searching for modules using the "Stable Release" filter, it seems that Drupal 9 is indeed forward compatible with Drupal 8!
Looking at more resources online for Python for Data Science. There are many good resources available. Of course the main tools are: Numpy , Pandas , MathPlotLib , SkiKit-Learn has some amazing tools. Kaggle for instance has Data Science contents, but good to install a local system like the Jupyter Notebook to speed things up as the Kaggle editor can lag and take some time to run on small data-sets. The newer DataCamp has some neat tutorials on it and simple App to do daily exercises on your mobile device. Here is the Python DataScience Handbook . Really useful. A short tutorial: Learn Python for Data Science , a fun read. A list of cool DataSci tutorials is here , and another how to get started with Python for DS . Will add more later.