import cadquery as cq
w0=cq.Workplane('YZ',origin=(-12,0,0))
r=w0.sketch().segment((-50,-38),(-40,-38)).segment((-8,-38)).segment((-8,-18)).segment((50,-18)).segment((50,29)).segment((-22,29)).segment((-22,-17)).segment((-50,-17)).close().assemble().push([(14.5,6)]).rect(23,36,mode='s').push([(45,37)]).circle(1).finalize().extrude(24)