Refines a subdivision surface set of components based on the selection list. The selected components are subdivided. The selection list after the command is the newly created components at the finer subdivision level.
Derived from mel command maya.cmds.refineSubdivSelectionList
Example:
import pymel.core as pm
import maya.cmds as cmds
# after selecting components of a subdivision surface
pm.refineSubdivSelectionList()