import cadquery as cq
w0=cq.Workplane('YZ',origin=(-3,0,0))
w1=cq.Workplane('XY',origin=(0,0,12))
r=w0.sketch().segment((-35,-15),(-35,1)).arc((-27,-40),(-28,2)).segment((-28,-15)).close().assemble().push([(30,17)]).rect(40,46).finalize().extrude(-38).union(w0.workplane(offset=43/2).moveTo(10,13).box(36,22,43)).union(w1.sketch().segment((-6,-2),(20,-2)).segment((20,2)).segment((15,2)).segment((15,10)).segment((20,10)).segment((20,22)).segment((-6,22)).close().assemble().finalize().extrude(-40))