#coding=utf-8 __auther__ = 'xianbao' import urllib import os def reporthook(blocks_read, block_size, total_size):  if not blocks_read:   print '打开连接'   return  if total_size < 0:   print "%d正在读取(%dbytes完成)"%(blocks_read, blocks_read * block_size)  else:   amout_read = block_size * blocks_read   print '%d正在读取，%d/%d'%(blocks_read, amout_read, total_size)  return try:  filename, msg = urllib.urlretrieve('http://www.1sucai.cn/', reporthook=reporthook)  print  print '文件是：', filename  print '头文件是'  print msg  print '删除前的文件地址：', os.path.exists(filename) finally:  urllib.urlcleanup()  print '文件依然存在：', os.path.exists(filename)