import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,10))
r=w0.sketch().segment((-19,19),(-13,19)).segment((-13,15)).segment((-17,12)).segment((-13,8)).segment((-13,-15)).segment((19,-15)).segment((19,19)).segment((46,19)).segment((46,31)).segment((34,31)).segment((44,39)).segment((35,50)).segment((11,33)).segment((-13,33)).segment((-13,31)).segment((-19,31)).close().assemble().finalize().extrude(-20).union(w0.sketch().arc((-40,-45),(-33,-46),(-28,-50)).arc((-19,-12),(-40,-45)).assemble().finalize().extrude(-19))