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Context· property

Context.selection

the user's current selection, if any

Python

selection: Selection

Returns Selection — the current selection (entities/rows), or None

Example#

Python

@tool.command("demo/count_selected")
def count_selected(ctx: Context):
    n = len(ctx.selection) if ctx.selection else 0

A lazily populated slot — None when nothing is selected or the invoking surface has no selection. Guard before iterating.