good afternoon, and tried in several ways but I do not get what I require:
I have two lists of which the ones in the arrow are the ones I want to delete but I can’t, both data are the same and I only want to keep the ones that are not the same
I tried some nodes like list.setdifferene but it keeps all 3.
NOTE: the values in the arrow are the same in all their properties
Wouldn’t this do it for you?
Or have a look at the Unique.Item node?
Hi @roberthwacner ,
It could be that of some internal rounding within Dynamo that they appear the same but aren’t exactly the same, i.e. -3.590 =/= -3.5900000000001
Perhaps you could try rounding your values, or mapping your lines to corresponding values, i.e. “Line1”, “Line2” in a dictionary if that doesn’t work, then you could simply compare the dictionary keys instead of the lines itself 
PS: I tested your workflow aswell and I am getting correct results:
