import cadquery as cq
w0=cq.Workplane('YZ',origin=(-49,0,0))
r=w0.sketch().push([(-30,29)]).circle(20).push([(-38,31)]).circle(4,mode='s').reset().face(w0.sketch().segment((21,-43),(26,-43)).arc((35,-49),(44,-43)).segment((50,-43)).segment((50,-36)).segment((44,-36)).arc((35,-30),(26,-36)).segment((21,-36)).close().assemble()).finalize().extrude(99)