Python - Cambio de rsvg de python 2.7 a Rsvg de python 3 origina diferencias

#!/usr/bin/python

#Credito a https://stackoverflow.com/questions/120584/svg-rendering-in-a-pygame-application

import array

import math

import cairo

import pygame

import rsvg

WIDTH = 960

HEIGHT = 960

color = [0,0,0]

data = array.array('c', chr(0) * WIDTH * HEIGHT * 4)

print len(data)

surface = cairo.ImageSurface.create_for_data(

    data, cairo.FORMAT_ARGB32, WIDTH, HEIGHT, WIDTH * 4)

#print surface

pygame.init()

window = pygame.display.set_mode((WIDTH, HEIGHT))

#print window

svg=[]

for k in range(60):

	svg.append(rsvg.Handle(file="./imggame/"+str(k)+".svg"))

	ctx = cairo.Context(surface)

	svg[k].render_cairo(ctx)

	screen = pygame.display.get_surface()

   	screen.fill(color)

	image = pygame.image.frombuffer(data.tostring(), (WIDTH, HEIGHT),"ARGB")

#	print len(image)

	screen.blit(image, (0,0))

	pygame.display.flip()

clock = pygame.time.Clock()

while True:

    clock.tick(15)

    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            raise SystemExit

Y este es el codigo en python 3, que origina un error entre el largo del buffer y el tamaño del formato y resolucion, que deben ser iguales. Intente cambiando la resolución de pygame, pero ahora creo que habría quecambiar el largo del buffer en 	image = pygame.image.frombuffer(data.tostring(), (WIDTH, HEIGHT),"ARGB")

#!/usr/bin/env python3

from PyQt5.QtWidgets import QMainWindow,QApplication,QWidget

from PyQt5.QtGui import QImage,QPainter

import pygame

import sys

import array

import math

import cairo

import pygame

import gi

gi.require_version('Rsvg', '2.0')

from gi.repository import Rsvg

WIDTH = 600

HEIGHT = 600

color = [0,0,0]

data = array.array('u', chr(0) * WIDTH * HEIGHT * 4)

print("largo ",len(data))

class MainWindow(QMainWindow):

    def __init__(self,surface,parent=None):

        super(MainWindow,self).__init__(parent)

        self.setCentralWidget(ImageWidget(surface))

        self.setGeometry(200,200,640,480)

surface = cairo.ImageSurface.create_for_data(

    data, cairo.FORMAT_ARGB32, WIDTH, HEIGHT, WIDTH *4)

pygame.init()

window = pygame.display.set_mode((WIDTH, HEIGHT))

svg=[]

for k in range(2):

    svg.append(Rsvg.Handle.new_from_file("./imggame/"+str(k)+".svg"))

    ctx = cairo.Context(surface)

    svg[k].render_cairo(ctx)

    screen = pygame.display.get_surface()

    resized_screen = pygame.transform.scale(screen, (WIDTH,HEIGHT))

    screen.fill(color)

    image = pygame.image.frombuffer(data.tostring(), (WIDTH, HEIGHT),"ARGB")

#1.pygame.image.frombuffer(string, size, format):          return Surface

 #      create a new Surface that shares data inside a string buffer

#1440000÷3686400

#    print(image)

    screen.blit(image, (0,0))

    pygame.display.flip()

clock = pygame.time.Clock()

while True:

    clock.tick(15)

    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            raise SystemExit

app=QApplication(sys.argv)

w=MainWindow()

w.show()

app.exec_()