Hi, I’m trying to subtract window areas from wall areas and whenever there isnt a window within a wall, it returns an empty list, which doesn’t work in subtracting formula a-b = c, where a = wall area, b = window area.
I suppose a python if else statement might work here, but I don’t know how to formulate the question. If b == 0? If b== real? I also tried using List.isEmpty, and packages but nothing seemed to work
I’m sure there is a very simple answer and I’m clearly doing something wrong.