# -*- coding: utf-8 -*-  '''     '''  import os  from PIL import Image     pic_dir = r"H:\新建文件夹"  for filename in os.listdir(path=pic_dir):      if filename.startswith("SAM"):          pic_path = os.path.join(pic_dir, filename)          print (pic_path)          img = Image.open(pic_path )          new_size = tuple( [ size//3 for size in img.size]  ) # 高度、宽度均变为原来的1/3          new_img = img.resize( new_size)          new_name = os.path.join(pic_dir, "small_" + filename)          new_img.save(new_name )