Python爬取房产数据，在地图上展现！

# -*- coding: utf-8 -*-
from scrapy import Spider,Request
import re
from jiwu.items import JiwuItem


class JiwuspiderSpider(Spider):
    name = "jiwuspider"
    allowed_domains = ["wlmq.jiwu.com"]
    start_urls = ['http://wlmq.jiwu.com/loupan']

    def parse(self, response):
        """
        解析每一页房屋的list
        :param response: 
        :return: 
        """
        for url in


    
 response.xpath('//a[@class="index_scale"]/@href').extract():
            yield Request(url,self.parse_html)  # 取list集合中的url  调用详情解析方法

        # 如果下一页属性还存在，则把下一页的url获取出来
        nextpage = response.xpath('//a[@class="tg-rownum-next index-icon"]/@href').extract_first()
        #判断是否为空
        if nextpage:
            yield Request(nextpage,self.parse)  #回调自己继续解析



    def parse_html(self,response):
        """
        解析每一个房产信息的详情页面，生成item
        :param response: 
        :return: 
        """
        pattern = re.compile('


    
            s = re.findall(pattern2,pricestr)
            if len(s) == 0:
                item['price'] = 0
            else:item['price'] = s[0]
            item['lng'] = result[0]
            item['lat'] = result[1]
        yield item

# -*- coding: utf-8 -*-

# Define here the models for your scraped items
#
# See documentation in:
# http://doc.scrapy.org/en/latest/topics/items.html


    


import scrapy


class JiwuItem(scrapy.Item):
    # define the fields for your item here like:
    name = scrapy.Field()
    price =scrapy.Field()
    address =scrapy.Field()
    lng = scrapy.Field()
    lat = scrapy.Field()

    pass

# -*- coding: utf-8 -*-

# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: http://doc.scrapy.org/en/latest/topics/item-pipeline.html
import pymongo



    
from scrapy.conf import settings
from openpyxl import workbook

class JiwuPipeline(object):
    wb = workbook.Workbook()
    ws = wb.active
    ws.append(['小区名称', '地址', '价格', '经度', '纬度'])
    def __init__(self):
        # 获取数据库连接信息
        host = settings['MONGODB_URL']
        port = settings['MONGODB_PORT']
        dbname = settings['MONGODB_DBNAME']
        client = pymongo.MongoClient(host=host, port=port)

        # 定义数据库
        db = client[dbname]
        self.table = db[settings['MONGODB_TABLE']]

    def process_item(self, item, spider):
        jiwu = dict(item)
        #self.table.insert(jiwu)
        line = [item['name'


    
], item['address'], str(item['price']), item['lng'], item['lat']]
        self.ws.append(line)
        self.wb.save('jiwu.xlsx')

        return item