自己刚接触python，参考网上一个教程写的。记录一下。
# Filename: CopyPictures.py
import os
import time
from os import listdir
from os.path import isdir
#source = ['/home/swaroop/byte', '/home/swaroop/bin']
source = 'C:\\Program Files\\Coopen\\image\\image_100042'
target_dir = 'D:\\My Documents\\My Pictures\\my'
now = time.strftime('%Y%m%d')
if isdir(source) != True:
print 'Error: source is not a directory'
exit()
k=0
filelist = listdir(source)
print(filelist)
t = 0
for name in filelist :
if name.find('jpg') == -1 and name.find('png') == -1 :
del(filelist[t])
t = t + 1
print(filelist)
#exit()
for name in filelist :
srcFilename = source + '\\' + name
srcFilename = '"' + srcFilename + '"'
desFilename = target_dir + '\\' + now + '_' + name
desFilename = '"' + desFilename + '"'
print
copy_command = "copy %s %s" % (srcFilename, desFilename)
print copy_command
if os.system(copy_command) == 0:
k = k + 1
print 'Successful backup to copy from', srcFilename, 'to' ,desFilename
else:
print 'Fail to copy', srcFilename, 'to', desFilename
print 'total copy', k, 'files'