import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-20,0))
r=w0.sketch().segment((-44,-98),(-3,-98)).segment((-3,-100)).segment((3,-100)).segment((3,-98)).segment((44,-98)).segment((44,98)).segment((3,98)).segment((3,100)).segment((-3,100)).segment((-3,98)).segment((-44,98)).close().assemble().circle(27,mode='s').finalize().extrude(40)