import cadquery as cq
w0=cq.Workplane('YZ',origin=(-10,0,0))
r=w0.sketch().segment((-50,6),(-45,-23)).segment((-12,-17)).arc((4,-20),(17,-12)).segment((50,-6)).segment((45,23)).segment((12,17)).arc((2,21),(-8,19)).arc((-9,-2),(-26,10)).close().assemble().finalize().extrude(21)