Resize textures using python

resize_tex.py

import maya.cmds as cmds
import maya.OpenMaya as om
 
fileNodes = cmds.ls(sl=1)
width = 1024
height = 1024
image = om.MImage()
 
for i in fileNodes:
    filePath = cmds.getAttr(i+'.fileTextureName')
    image.readFromFile ( filePath )
    image.resize( width, height, False )
    image.writeToFile( filePath.split(".")[0] +'_resized.png', 'png')
 
    # replace file textures with resized images
    cmds.setAttr(i+'.fileTextureName', filePath.split(".")[0]+'_resized.png', type='string')