import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,11))
r=w0.sketch().segment((-50,11),(-37,-10)).segment((-34,-40)).segment((-20,-38)).segment((-13,-49)).segment((11,-35)).segment((42,-31)).segment((40,-17)).segment((50,-11)).segment((37,10)).segment((34,40)).segment((20,38)).segment((13,49)).segment((-11,35)).segment((-42,31)).segment((-40,17)).close().assemble().finalize().extrude(-23)