How to copy element from view to another view?

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How to Handle Variable Input List Length/Nesting in Custom Nodes (Python)

Has anyone found a good method for handling various input types in a custom node? I’m trying to find a python or OOTB solution that allows me to take a variable input (flat list, nested list, single item, etc) and to turn it into the same type of list structure. I tried using flatten and list.join, but that doesn’t work for single items that are not part of a list yet. List.create causes problems for already nested lists. Thoughts?