import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-36))
r=w0.sketch().segment((-23,-44),(1,-50)).segment((9,-17)).arc((19,-4),(15,11)).segment((23,44)).segment((-1,50)).segment((-9,17)).arc((-19,4),(-15,-11)).close().assemble().reset().face(w0.sketch().segment((-2,-8),(-2,8)).arc((-9,0),(-2,-8)).assemble(),mode='s').reset().face(w0.sketch().arc((2,-8),(9,0),(2,8)).close().assemble(),mode='s').finalize().extrude(72)