Python__递归遍历文件

http://zhangjunhd.blog.51cto.com/113473/453857
http://www.cnblogs.com/xuxm2007/archive/2010/08/09/1795504.html
http://www.cnblogs.com/phonefans/archive/2008/10/15/1311707.html

#coding=gbk
'''os.walk(dir) 是三列的数组'''

import os
dir = os.getcwd()

for cons in os.walk(dir):
    print cons

#根目录、所有目录、目录下的文件
for root, dirs, files in os.walk(dir):
    for name in files:
        print os.path.join(root, name)

def getAllFile (dir, list):
    for root, dirs, files in os.walk(dir):
        for name in files:
            list.append( os.path.join(root, name) )
    return len(list)

file.read()  读全部
file.read(N) N个字节
file.readline() 
file.readlines() return a list

file.write(...)

file.seek(0)
file.next()
file.close()

#!/usr/bin/python
import os
import shutil,string 

def subString(str, sub):
    return sub in str


dir = '/Users/xserver/Desktop/new_res/'

for root, dirs, files in os.walk(dir):  
    for name in files:
        path = os.path.join(root, name) 
        if subString(path, '.jpg'):
            path2 = path.replace('.jpg','.png')
            print path
            shutil.move(path, path2);