import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,13))
r=w0.sketch().segment((-28,-38),(-23,-38)).arc((-15,-47),(-4,-50)).segment((-4,-17)).segment((13,-17)).arc((9,-13),(5,-10)).segment((5,2)).segment((28,2)).segment((28,50)).segment((-4,50)).segment((-4,29)).segment((-28,29)).close().assemble().finalize().extrude(-26)