*py_moudle<urllib>

import urllib
def hook(a,b,c): #回调函数
    tem = 100.0 * a * b / c
    if tem>100:
        tem=100
    print '%.2f%%' % tem
url = "http://192.168.102.42/www/"
path = "d:\\1.txt"
urllib.urlretrieve(url, path, hook) # 下载html

f = urllib.urlopen("xxx") 
print f.read()  # 类似于文件操作 readlines, readline