If you are interested in learning how to use the Python node in Dynamo. I have created several Youtube videos for beginners on how to edit, modify, collect, get parameters, set parameters and delete elements.
The Youtube code is commented and hosted on my Github. This is a great place if you want to copy and paste my code to test it for yourself or edit it to fit your own flow.
I continue to add new files regularly, but I thought I would share with the community in case anyone else wants to use these Python samples.