import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-6,0))
r=w0.sketch().segment((-40,-50),(37,-50)).segment((37,2)).arc((40,15),(37,28)).segment((37,37)).segment((32,37)).arc((5,50),(-23,37)).segment((-40,37)).close().assemble().reset().face(w0.sketch().segment((-20,-5),(16,-15)).segment((17,-8)).segment((-18,2)).close().assemble(),mode='s').finalize().extrude(13)