import cadquery as cq
w0=cq.Workplane('YZ',origin=(-17,0,0))
r=w0.sketch().segment((-30,-50),(26,-50)).segment((26,-20)).segment((27,-21)).segment((30,-14)).segment((29,-13)).segment((30,-13)).segment((30,-1)).segment((26,-1)).segment((26,50)).segment((-30,50)).close().assemble().finalize().extrude(35)