part for reprapper

import Part
from FreeCAD import Base

V1 = Base.Vector(0,10,0)
V2 = Base.Vector(30,10,0)
V3 = Base.Vector(30,-10,0)
V4 = Base.Vector(0,-10,0)

VC1 = Base.Vector(-10,0,0)
C1 = Part.Arc(V1,VC1,V4)

VC2 = Base.Vector(40,0,0)
C2 = Part.Arc(V2,VC2,V3)

L1 = Part.Line(V1,V2)
L2 = Part.Line(V4,V3)

S1 = Part.Shape([L1,L2,C1,C2])

W = Part.Wire(S1.Edges)
P = W.extrude(Base.Vector(0,0,10))

Part.show(P)