Python实现下载进度

# encoding:utf-8
import urllib
import os

def Schedule(a,b,c):
'''''
a:已经下载的数据块
b:数据块的大小
c:远程文件的大小
'''
per = 100.0 * a * b / c
if per > 100 :
per = 100
print '%.2f%%' % per

def dowlonad():
url = 'http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tar.bz2'
local = os.path.join('E:/xiaol/T/', 'Python-2.7.5.tar.bz2')
urllib.urlretrieve(url, local, Schedule)

if __name__ == '__main__':
dowlonad()