python 将图片批量保存到与图片同名的文件下

import os,  shutil


firstdir = 'I:/shapenet sketch/04530566'
tardir = 'I:/freedraw/04530566/'

for root, dirs, files in os.walk(firstdir):
    path = []
    imgslist = files
    print(imgslist)
    for img in imgslist:
        # print(img)
        path.append(img[0:-4])
    for pathname in path:
        newdir = tardir + pathname
        print(pathname)
        png = firstdir + '/' + pathname +'.png'
        print(newdir)
        os.makedirs(tardir+pathname)
        shutil.copy(png,newdir)