I just would like to mention the following. The page https://www.knime.com/knime-python is the first hit when googling “knime python” or searching “python” on the knime homepage search bar. It gives a broad overview of how one can use Python with KNIME.
There are three links on that page that all direct to “KNIME Python 2 Integration (legacy)”. That page states “Please refrain from using this extension if possible”. I think these links need to be updated, especially considering how important Python integration is for the Knime platform.