Python模拟http get详解编程语言

import sys, urllib2, urllib 
 
def addGETdata(url, data): 
    '''Adds data to url.  Data should be a list or tuple consisting of 2-item 
    lists or tuples of the form: (key, value). 
 
    Items that have no key should have key set to None. 
 
    A given key may occur more than once. 
    ''' 
    return url + '?' + urllib.urlencode(data) 
 
zipcode = 'S2S 7U8' 
url = addGETdata('http://www.wunderground.com/cgi-bin/findweather/getForecast', 
                 [('query', zipcode)]) 
print 'Using URL', url 
req = urllib2.Request(url) 
fd = urllib2.urlopen(req) 
while 1: 
    data = fd.read(1024) 
    if not len(data): 
        break 
    sys.stdout.write(data)