import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-100))
r=w0.sketch().arc((-17,5),(15,-8),(-14,11)).segment((-11,11)).segment((-11,10)).segment((-7,10)).segment((-7,0)).segment((-13,0)).segment((-13,5)).close().assemble().finalize().extrude(200)