import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-17))
r=w0.sketch().segment((-100,-21),(-97,-31)).segment((-97,-38)).segment((97,-38)).segment((97,20)).segment((100,21)).segment((97,31)).segment((97,38)).segment((-97,38)).segment((-97,-20)).close().assemble().finalize().extrude(35)