Hi @ekadagami,
I’m glad you play around!
What do you mean with ‘some tinkering’ to set up a Conda environment?
I think, generally, the tutorial to write a Python node (for this part, step 4) should explain that. If that tutorial needs improvement, I’ll gladly take suggestions 
Have you looked at the methods’ docstring?
It can be found in the ReadTheDocs.
Or in your editor, if it is set up to use the autocompletion, it also gives access to the docstring (see the tutorial).
Or in the forum, where I linked examples: Progress bar - #2 by steffen_KNIME
Does that help? Happy coding!
Steffen