我爬了链家青岛市北3000套二手房得出一个结论

CREATE TABLE `house` (
   `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键',
   `url` int(11) NOT NULL COMMENT '二手房地址',
   `housing_estate` varchar(20) NOT NULL COMMENT '小区',
   `position` varchar(20) NOT NULL COMMENT '位置',
   `square_metre` decimal(10,2) NOT NULL COMMENT '大小 平米',
   `unit_Price` int(11) NOT NULL COMMENT '单价元 基本都是整数',
   `total_price` int(11) NOT NULL COMMENT '单价万元 基本都是整数',
   `follow` int(11) NOT NULL COMMENT '关注量',
   `take_look` int(11) NOT NULL COMMENT '带看量',
   `pub_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '发布日期',
   PRIMARY KEY (`url`),
   UNIQUE KEY `id` (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8

#coding=utf-8
#!/usr/bin/python
__author__ = "小柒"
__blog__ = "https://blog.52itstyle.com/"
# 导入requests库
import requests
# 导入文件操作库
import os
import re
import bs4
from bs4 import BeautifulSoup
import sys
from util.mysql_DBUtils import mysql


# 写入数据库
def write_db(param):
    try:
        sql = "insert into house (url,housing_estate,position,square_metre,unit_price,total_price,follow,take_look,pub_date) "
        sql = sql + "VALUES(%(url)s,%(housing_estate)s, %(position)s,%(square_metre)s,"
        sql = sql + "%(unit_price)s,%(total_price)s,%(follow)s,%(take_look)s,%(pub_date)s)"
        mysql.insert(sql, param)
    except Exception as e:
        print(e)


# 主方法
def main():
    # 给请求指定一个请求头来模拟chrome浏览器
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36'}
    page_max = 100
    for i in range(1, int(page_max) + 1):
        if i == 1:
            house = 'https://qd.lianjia.com/ershoufang/shibei/'
        else:
            house = 'https://qd.lianjia.com/ershoufang/shibei/pg'+str(i)
        res = requests.get(house, headers=headers)
        soup = BeautifulSoup(res.text, 'html.parser')
        li_max = soup.find('ul', class_='sellListContent').find_all('li')
        for li in li_max:
            try:
                house_param = {}
                #  荣馨苑  | 3室2厅 | 115.91平米 | 南 北 | 毛坯 | 无电梯
                content = li.find('div', class_='houseInfo').text
                content = content.split("|")
                house_param['housing_estate'] = content[0]
                house_param['square_metre'] = re.findall(r'-?\d+\.?\d*e?-?\d*?', content[2])[0]
                # --------------------------------------------------------#
                #  位置 水清沟
                position = li.find('div', class_='positionInfo').find('a').text
                house_param['position'] = position
                # --------------------------------------------------------#
                totalprice = li.find('div', class_='totalPrice').text
                house_param['total_price'] = re.sub("\D", "", totalprice)
                unitprice = li.find('div', class_='unitPrice').text
                house_param['unit_price'] = re.sub("\D", "", unitprice)
                # --------------------------------------------------------#
                # 57人关注 / 共13次带看 / 6个月以前发布
                follow = li.find('div', class_='followInfo').text
                follow = follow.split("/")
                house_param['follow'] = re.sub("\D", "", follow[0])
                house_param['take_look'] = re.sub("\D", "", follow[1])
                # --------------------------------------------------------#
                # 二手房地址
                title_src = li.find('div', class_='title').find('a').attrs['href']
                house_param['url'] = re.sub("\D", "", title_src)
                res = requests.get(title_src, headers=headers)
                soup = BeautifulSoup(res.text, 'html.parser')
                # --------------------------------------------------------#
                # 挂牌时间(重要数据)
                pub_date = soup.find('div', class_='transaction').find_all('li')[0].find_all('span')[1].text
                house_param['pub_date'] = pub_date
                write_db(house_param)
            except Exception as e:
                print(e)
        mysql.end("commit")
    mysql.dispose()


if __name__ == '__main__':
    main()