python进度条

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import urllib

url = "http://www.163.com/"

#html = urllib.urlopen(urllib)

local = "C:\\Users\\Administrator\\Desktop\\ruiy.html"

def callback(a,b,c):
down_progress = 100.0 * a *b / c
if down_progress > 100:
down_progress = 100
print("%.2f" % down_progress)

urllib.urlretrieve(url,local,callback)