import cadquery as cq
w0=cq.Workplane('YZ',origin=(-100,0,0))
r=w0.sketch().circle(85).reset().face(w0.sketch().segment((-80,15),(-61,-54)).segment((-57,-53)).segment((-57,21)).close().assemble(),mode='s').reset().face(w0.sketch().segment((57,-21),(80,-15)).segment((61,54)).segment((57,53)).close().assemble(),mode='s').finalize().extrude(200)