rollout uv layout as scripted node to 3D sverchok SN1

rolloutuv.py

import bmesh
from sv_bmesh_utils import *
#import numpy as np

def sv_main(object=[],layout=-1):

    in_sockets = [
        ['s', 'object', object],
        ['s', 'layout', layout],
    ]

    def out_sockets(*args):
        out_sockets = [
            ['v', 'vertices', args[0]],
            ['s', 'polygons', args[1]]
        ]
        return out_sockets

    if not object:
        return in_sockets, out_sockets([],[])


    def UV(object):
        mesh = object.data
        bm = bmesh.new()
        bm.from_mesh(mesh)
        uv_layer = bm.loops.layers.uv[min(layout, len(bm.loops.layers.uv)-1)]

        nFaces = len(bm.faces)
        bm.verts.ensure_lookup_table()
        bm.faces.ensure_lookup_table()

        vertices_dict = {}
        polygons_new = []
        for fi in range(nFaces):
            polygons_new_pol = []
            for loop in bm.faces[fi].loops:
                polygons_new_pol.append(loop.index)
                vertices_dict[loop.index] = list(loop[uv_layer].uv[:])+[0]
            polygons_new.append(polygons_new_pol)
        bm.clear()
        del bm
        vertices_new = [i for i in vertices_dict.values()]
        print(vertices_new)
        return [vertices_new], [polygons_new]
    v,p = UV(bpy.data.objects[object[0][0][0]])
    return in_sockets, out_sockets(v, p)