I’ve selected some model elements. These can be columns, filled regions or lines.
I want to separate them by type. I could put in a load of bool masks (did it for the lines) but I thought Python would be neater… But I can’t get it to work. What am I doing wrong?
Hi @Alien ,
Have you tried the node List.GroupByKey?
Actually trying the group by key now and making a right mess so far 
I think List.RemoveIfNot is the node you want
It’s just dawned on me I was using sort by key not group.
Doh! I’d still like someone to show me how to do it in Python though if anyone knows please. 
Ever have one of those days where you stare at the screen for 6+ hours and get nowhere? Even when you’ve done the same sort of thing 50x before… Then suddenly at 5.30pm you wake up and within 2 hours you’ve done a day’s work… But then think… It’s Friday and I’ve just finished work at 7.30… ARRGH.
At least I have forum birthday 
