import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-28,0))
r=w0.sketch().segment((-50,4),(-29,4)).segment((-21,-12)).segment((31,10)).segment((31,-44)).segment((50,-44)).segment((50,18)).segment((31,18)).segment((31,11)).segment((19,40)).segment((6,34)).segment((6,44)).segment((-50,44)).close().assemble().push([(42,-41)]).rect(4,4,mode='s').finalize().extrude(57)