Attribute Wrangle has a group parameter to limit which points we run the vex code on. But how could I get the number of points in the group? @numpt returns the number of points of the whole geometry.

I know expandpointgroup(), but it doesn't seem to be a very good idea to run it on every single point.

npointsgroup(surface_node, group_name)

majstorovich
npointsgroup(surface_node, group_name)

But it's for a specific group. My question is about the group parm, which can be a group syntax expression. I asked this because while I don't know how Wrangle is implemented, but logically Houdini needs to collect all the points in the group parm before it runs the vex; therefore I assume there is a way to access the number of points in the Vex.