import cadquery as cq
w0=cq.Workplane('YZ',origin=(-21,0,0))
r=w0.sketch().segment((-94,41),(-21,-100)).segment((94,-41)).segment((58,28)).segment((58,36)).segment((54,36)).segment((21,100)).close().assemble().rect(58,146,mode='s').finalize().extrude(42)