python使用post提交数据到远程url的方法

import sys, urllib2, urllib
zipcode = "S2S 1R8"
url = 'http://www.yoursiteweb.com/getForecast'
data = urllib.urlencode([('query', zipcode)])
req = urllib2.Request(url)
fd = urllib2.urlopen(req, data)
while 1:
  data = fd.read(1024)
  if not len(data):
    break
  sys.stdout.write(data)