Python 遍历目录 按类型大小过滤文件 删除空目录

#coding:utf-8
import os
image_types = [".jpg",".jpeg",".bmp",".png"]
for parent,dirs,files in os.walk("D:\grab") :
for file in files :
file=os.path.join(parent,file)
size=os.path.getsize(file)
if size < 150 * 1024:
os.remove(file)
continue
type=os.path.splitext(file)[1]
if not type in image_types:            os.remove(file)
for parent,dirs,files in os.walk("D:\grab") :
if len(files)==0 and len(dirs)==0:
os.removedirs(parent)