Selects geometry transforms under current selection

get_geo_from_selection.py

"""Selects geometry transforms under a current selection"""

import maya.cmds as mc

# Get all mesh shapes under parent group
sel_shapes = mc.ls(selection=True, dagObjects=1, type='mesh')

# Get parent transforms from shapes (supports duplicate names, remove "path" if you want to raise an error on dup names)
geo_transforms = mc.listRelatives(sel_shapes, parent=True, path=True)

# Select geometry transforms
mc.select(geo_transforms, r=True)