python script with multiple IO

I've just read some apparently obvious posts but those were not satisfying, at least for me. My question is how should we modify python script nodes, so that we could use more than 2 IO ports (as we only have 1=>1,1=>2,2=>1 and 2=>2 option)?

This is currently not available.

Here are some tips, you might want to try: https://tech.knime.org/forum/scripting-integrations/python-snippet-multiple-inputs