python如何实现根据京东商品url去获取商品价格？

# -*- coding: utf-8 -*-
"""
根据京东url地址，获取商品价格
京东请求处理过程，先显示html页面，然后通过ajax get请求获取相应的商品价格
 
1.商品的具体数据在html中的格式，如下(示例)
# product: {
#   skuid: 1310118868,
#   name: '\u9999\u5f71\u77ed\u88d9\u4e24\u4ef6\u5957\u88c5\u5973\u0032\u0030\u0031\u0034\u51ac\u88c5\u65b0\u6b3e\u97e9\u7248\u957f\u8896\u0054\u6064\u4e0a\u8863\u8377\u53f6\u8fb9\u534a\u8eab\u88d9\u6f6e\u0020\u85cf\u9752\u0020\u004d',
#   skuidkey:'7781F505B71CE37A3AFBADA119D3587F',
#   href: 'http://item.jd.com/1310118868.html',
#   src: 'jfs/t385/197/414081450/336886/3070537b/541be890N2995990c.jpg',
#   cat: [1315,1343,1355],
#   brand: 18247,
#   nBrand: 18247,
#   tips: false,
#   type: 2,
#   venderId:38824,
#   shopId:'36786',
#   TJ:'0',
#   specialAttrs:["is7ToReturn-1"],
#   videoPath:'',
#   HM:'0'
#  }
 
2.ajax请求代码如下：
# // 获得数字价格
# var getPriceNum = function(skus, $wrap, perfix, callback) {
#  skus = typeof skus === 'string' ? [skus]: skus;
#  $wrap = $wrap || $('body');
#  perfix = perfix || 'J-p-';
#  $.ajax({
#   url: 'http://p.3.cn/prices/mgets?skuIds=J_' + skus.join(',J_') + '&type=1',
#   dataType: 'jsonp',
#   success: function (r) {
#    if (!r && !r.length) {
#     return false;
#    }
#    for (var i = 0; i < r.length; i++) {
#     var sku = r[i].id.replace('J_', '');
#     var price = parseFloat(r[i].p, 10);
#
#     if (price > 0) {
#      $wrap.find('.'+ perfix + sku).html('￥' + r[i].p + '');
#     } else {
#      $wrap.find('.'+ perfix + sku).html('暂无报价');
#     }
#
#     if ( typeof callback === 'function' ) {
#      callback(sku, price, r);
#     }
#    }
#   }
#  });
# };
"""
import urllib
import json
import re
 
 
class JdPrice(object):
 """
 对获取京东商品价格进行简单封装
 """
 def __init__(self, url):
  self.url = url
  self._response = urllib.urlopen(self.url)
  self.html = self._response.read()
 
 def get_product(self):
  """
  获取html中，商品的描述(未对数据进行详细处理，粗略的返回str类型)
  :return:
  """
  product_re = re.compile(r'compatible: true,(.*?)};', re.S)
  product_info = re.findall(product_re, self.html)[0]
  return product_info
 
 def get_product_skuid(self):
  """
  通过获取的商品信息，获取商品的skuid
  :return:
  """
  product_info = self.get_product()
  skuid_re = re.compile(r'skuid: (.*?),')
  skuid = re.findall(skuid_re, product_info)[0]
  return skuid
 
 def get_product_name(self):
  pass
 
 def get_product_price(self):
  """
  根据商品的skuid信息，请求获得商品price
  :return:
  """
  price = None
  skuid = self.get_product_skuid()
  url = 'http://p.3.cn/prices/mgets?skuIds=J_' + skuid + '&type=1'
  price_json = json.load(urllib.urlopen(url))[0]
  if price_json['p']:
   price = price_json['p']
  return price
 
 
# 测试代码
if __name__ == '__main__':
 url = 'http://item.jd.com/1310118868.html'
 url = 'http://item.jd.com/1044773.html'
 jp = JdPrice(url)
 print jp.get_product_price()
 
 
# htm.decode('gb2312', 'ignore').encode('utf-8')
# f = open('jjs.html', 'w')
# f.write(htm)
# f.close()

fromcreepyimportCrawler
fromBeautifulSoupimportBeautifulSoup
importurllib2
importjson

classMyCrawler(Crawler):
defprocess_document(self,doc):
ifdoc.status==200:
print[%d]%s%(doc.status,doc.url)
try:
soup=BeautifulSoup(doc.text.decode(gb18030).encode(utf-8))
exceptExceptionase:
printe
soup=BeautifulSoup(doc.text)
printsoup.find(id="product-intro").div.h1.text
url_id=urllib2.unquote(doc.url).decode(utf8).split(/)[-1].split(.)[0]
f=urllib2.urlopen(http://p.3.cn/prices/get?skuid=J_+url_id,timeout=5)
price=json.loads(f.read())
f.close()
printprice[0][p]
else:
pass

crawler=MyCrawler()
crawler.set_follow_mode(Crawler.F_SAME_HOST)
crawler.set_concurrency_level(16)
crawler.add_url_filter(.(jpg|jpeg|gif|png|js|css|swf)$)
crawler.crawl(http://item.jd.com/982040.html)