Python实战计划——第二周第一节：开始使用MongoDB

视频重点

练习代码

扩展

1. 视频重点

1. 操作与客户端（本地的mongodb）进行链接（激活）； 给客服打同电话client = pymongo.MongoClint('localhost',27017)
   创建数据库命名 = 给excel命名；告诉客服要定一个酒店hotel = client['hotel']
   给数据库的文件创建表单（页） = 给Excel创建sheet；而且定具体的房间room = hotel['room']
   房间是存放东西的，而酒店可以有很多房间，客服又可以联系到很多酒店，但每次都要联系客服。

2. enumerate:会将数组或列表组成一个索引序列。

   
   enumerate.jpg
3. 添加数据：room.insert_one()
4. 查找：room.find() $lt/$gt/$lte/$gte/$!=分别是<,><=,>=,不等于

2.练习代码

from bs4 import BeautifulSoup
    import requests
    import time
    import pymongo
    
    client = pymongo.MongoClient('localhost', 27017)
    dz = client['dz']
    dzinfo = dz['dzinfo']
    headers = {
        "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/7046A194A",
        "Cookie": "abtest_ABTest4SearchDate=b; xzuuid=d8302b2c; OZ_1U_2282=vid=v742d196332c56.0&ctime=1464069891&ltime=1464069890; OZ_1Y_2282=erefer=-&eurl=http%3A//bj.xiaozhu.com/search-duanzufang-p1-0%3Ft%3D1463996817649&etime=1463996822&ctime=1464069891&ltime=1464069890&compid=2282; _ga=GA1.2.679671644.1463996823; _gat_UA-33763849-7=1; __utmt=1; __utma=29082403.679671644.1463996823.1463996824.1464069893.2; __utmb=29082403.1.10.1464069893; __utmc=29082403; __utmz=29082403.1463996824.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)"
    }
    
    urls = []
    
    
    # url = 'http://bj.xiaozhu.com/search-duanzufang-p1-0/'
    # urla = 'http://bj.xiaozhu.com/fangzi/1580034935.html'
    
    
    def each_href(url):
        wb_data = requests.get(url, headers=headers)
        soup = BeautifulSoup(wb_data.text, 'lxml')
        xiangqings = soup.select('a.resule_img_a')
        for xiangqing in xiangqings:
            urls.append(xiangqing.get('href'))
        return (print(urls,len(urls)))
    
    
    def each_info(urla):
        wb_data = requests.get(urla)
        time.sleep(2)
        soup = BeautifulSoup(wb_data.text, 'lxml')
        titles = soup.select('div.pho_info > h4 > em')
        prices = soup.select('#pricePart > div.day_l > span')
        adds = soup.select('span[class="pr5"]')
        img_rooms = soup.select('#detailImageBox > div.pho_show_r > div > ul > li > img')
        img_hosts = soup.select('#floatRightBox > div.js_box.clearfix > div.member_pic > a > img')
        ffs = soup.select('#floatRightBox > div.js_box.clearfix > div.w_240 > h6 > span')
        names = soup.select('#floatRightBox > div.js_box.clearfix > div.w_240 > h6 > a')
    
        for title, price, add, img_room, img_host, ff, name in zip(titles, prices, adds, img_rooms, img_hosts, ffs, names):
            if str(ff) == '<span class="member_girl_ico"></span>':
                ff = "女性"
            else:
                ff = "男性"
            data = {
                'title': title.get_text(),
                'price': price.get_text(),
                'add': add.get_text().split("\n")[0],
                'img_room': img_room.get('data-bigimg'),
                'img_host': img_host.get('src'),
                'ff': ff,
                'name': name.get_text()
            }
            # print(data)
            dzinfo.insert_one(data)
    
    
    i = input("想爬取多少页的信息？")
    for k in range(1, int(i)+1):
        for url in ['http://bj.xiaozhu.com/search-duanzufang-p{}-0/'.format(k)]:
            each_href(url)
    print(urls, len(urls))
    for urla in urls:
        each_info(urla)
    for info in dzinfo.find():
        if int(info['price'])>=500:
            print(info)

运行结果

运行结果.jpg

大于500的房源.jpg

注：在pycharm中的pymongo插件中查看爬到的结果，最多看到0~299，共300条信息

扩展

MongoDB 中文教程