python遍历文件夹读取文件大小

闲来无事，写了个小程序删除内存卡中大于50m的文件

# filename  itertaorfilefolder
import os
import os.path

filePath = raw_input('Enter filepath : ')

#遍历文件夹
#三个参数：分别返回1.父目录 2.所有文件夹名字（不含路径） 3.所有文件名字
for parent ,dirnames , filenames in os.walk(filePath):
    #输出文件夹信息
    for dirname in dirnames:
        print 'parent is :'+parent
        print 'dirname is '+ dirname
    #输出文件信息
    for filename in filenames :
        print 'parent is :'+parent
        print 'filename is :' + filename
        #输出文件路径信息
        currentPath = os.path.join(parent,filename)
        print 'the fulll name of the file is :'+ currentPath
        filesize = os.path.getsize(currentPath)/1024/1024
        print 'the file size is : %.3f MB' %(filesize)
        #删除大于50m的文件
        if filesize > 50:
            delete = raw_input(' are you sure to delete ?')
            if delete == 'yes':
                os.remove(currentPath)