import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-3))
r=w0.sketch().push([(-45,-35)]).circle(5).push([(-42,-34)]).circle(1,mode='s').finalize().extrude(-31).union(w0.sketch().arc((19,40),(27,27),(27,13)).segment((50,13)).segment((50,40)).close().assemble().finalize().extrude(38))