Ah geez…List.isEmpty.
You know how long a googled to find something that i could combine with a FilterbyBoolMask to rid myself of pesky empty list whilst maintaining list structure. oh my.
Sir. If you ever find yourself in New Zealand…
And per your previous comment about API and python, i have starting using the following resources to further my thirst for knowledge, but i am oh so new.
-Headfirst Python
-Edx
Also, after all our hard work, this is the result 
i feel like i am back at step 1 
Perfect graph inputs with no outputs on the graph side & back to test 3 scenario from original post.
