In fbx Object, how can I convert a quad to triangles with fbx python sdk

[Anonymous]

#I am already done
def format_from_triangle(*args):
    pass

.....
for fbxPolygonIndex in range(fbxPolygonCount):
    fbxPolygonSize = fbxMesh.GetPolygonSize(fbxPolygonIndex) 
    if fbxPolygonSize == 4:
        #todo convert quad to triangles(maybe 2 triangles)
        format_from_triangle()
    else:
        format_from_triangle()