import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-26,0))
r=w0.workplane(offset=36/2).moveTo(19,0).cylinder(36,31).union(w0.sketch().segment((-50,17),(-24,17)).segment((-23,18)).segment((-22,18)).segment((-22,17)).segment((-12,17)).segment((-12,22)).segment((-49,22)).arc((-50,19),(-50,17)).assemble().finalize().extrude(52))