python 删除指定时间间隔之前的文件实例

#!/usr/bin/env python# -*- coding: utf-8 -*-"""Document: Remove Synctoycmd sync expired .tmp files"""import osimport timeimport datetimedef diff():  '''time diff'''  starttime = datetime.datetime.now()  time.sleep(10)  endtime = datetime.datetime.now()  print "time diff: %d" % ((endtime-starttime).seconds)def fileremove(filename, timedifference):  '''remove file'''  date = datetime.datetime.fromtimestamp(os.path.getmtime(filename))  print date  now = datetime.datetime.now()  print now  print 'seconds difference: %d' % ((now - date).seconds)  if (now - date).seconds > timedifference:    if os.path.exists(filename):      os.remove(filename)      print 'remove file: %s' % filename    else:      print 'no such file: %s' % filenameFILE_DIR = 'D:/'if __name__ == '__main__':  print 'Script is running...'  #diff()  while True:    ITEMS = os.listdir(FILE_DIR)    NEWLIST = []    for names in ITEMS:      if names.endswith(".txt"):        NEWLIST.append(FILE_DIR + names)    #print NEWLIST    for names in NEWLIST:      print 'current file: %s' % (names)      fileremove(names, 10)    time.sleep(10)  print "never arrive..."