# -*- coding: utf-8 -*-

import os

path = "d:\\curl\data\\"

for file in os.listdir(path):

    print file

    if(os.path.isfile(os.path.join(path,file))==True):

        if file.find('.')>0:

            newname="new_"+file

            os.rename(os.path.join(path,file),os.path.join(path,newname))

            print file,'ok' 

# -*- coding: utf-8 -*-

import os 

def BatchRename(path,pattern):

    os.chdir(path)

    fileList=os.listdir(path)

    dotIndex = pattern.rfind('.')

    fileName = pattern[ : dotIndex]

    fileExt = pattern[dotIndex : ]

    genNum = 0

    for fileItem in fileList:

        fileFullName = fileName + '_' + str(genNum) + fileExt

        os.rename(fileItem, fileFullName)

        print (fileItem + ' => ' + fileFullName)

        genNum += 1

if __name__ == '__main__':

    BatchRename("d:\\curl\\data","test.log")

import os

os.chdir("d:\\curl\\data")

for file in os.listdir("d:\\curl\\data"):

    print file

    if(os.path.splitext(file)[1] == ".log"):

        print "yes"

        os.rename(file, os.path.splitext(file)[0]+".jpg")