以下內(nèi)容是原創(chuàng)，僅供初學(xué)者學(xué)習(xí)用，京東能夠開放給我們學(xué)習(xí)實(shí)在不容易，請模擬人類的行為學(xué)習(xí)爬取。

一 爬取的Python源碼

#爬取的代碼 import requests import re import time goods='書包' #搜索關(guān)鍵字 depth = 1 #搜索深度為2，即爬取第1頁，第2頁 start_url = 'https://search.jd.com/Search?keyword='+ goods+'&enc=utf-8&wq='+goods infoList=[] hd = {'user-agent':'Mozilla/5.0'} for j in range(depth): #對每一個(gè)頁面進(jìn)行處理，使用for循環(huán)try:url = start_url + '&page=' + str(j) # 組合成帶翻頁功能的url https://search.jd.com/Search?keyword=書包=utf-8&wq=書包&page=1try:r = requests.get(url,headers=hd,timeout=30)r.raise_for_status()r.encoding=r.apparent_encoding #把獲取到的頁面信息 替換成utf-8信息，這樣就不會亂碼print(r.status_code)html = r.textprint(r.url)print(r.text)except:print("抓取異常")try:plt = re.findall(r'<em>￥</em><i>.*?\.\d\d',html) #獲取商品價(jià)格,搜索以<em>￥</em><i>開頭，以.數(shù)字?jǐn)?shù)字結(jié)尾的字符串 tlt = re.findall(r'[^(<em>￥</em>)]<em>.*?[\u4e00-\u9fa5].*?</em>',html) #獲取商品名稱，搜索以<em>開始，以遇到的第一個(gè)</em>結(jié)尾的字符串,且 第一個(gè)字符是(<em>￥</em>)]<em>除外 for i in range(len(plt)):price = plt[i].split('<i>')[1]title = tlt[i]infoList.append([price,title]) # append() 方法用于在列表末尾添加新的對象。except: #讓程序不會因?yàn)楫惓?zhí)行而溢出print("分析異常")except:continue #如果某一個(gè)頁面解析出了entity，那么繼續(xù)解析下一個(gè)頁面。time.sleep(2) #注意，為了長久學(xué)習(xí)，要模擬人類的輸入，停留2秒tplt = "{:^10}\t{:^10}\t{:^20}" #設(shè)定一個(gè)print模板,用大括號{}來定義槽函數(shù) print(tplt.format("序號","價(jià)格","商品名稱"))# Python2.6 開始，新增了一種格式化字符串的函數(shù) str.format()，它增強(qiáng)了字符串格式化的功能。format用法舉例：print("網(wǎng)站名：{name}, 地址 {url}".format(name="菜鳥教程", url="www.runoob.com")) count=0 for g in infoList:count = count +1print(tplt.format(count,g[0],g[1])) #打印商品價(jià)格、名稱，字符串沒做處理

二 爬取到的信息：
序號 價(jià)格 商品名稱
1 49.00 多功能學(xué)生掛書袋可調(diào)課桌掛袋書本收納袋 學(xué)生掛書袋 書掛袋書桌收納袋文件文具掛書袋課桌神器掛架 藍(lán)色
2 99.00 稻草人雙肩包男女14/15.6英寸大容量筆記本電腦包多功能旅行出差背包防潑水商務(wù)休閑學(xué)生書包50470黑色
3 69.00 雙肩包男士背包大容量時(shí)尚休閑商務(wù)旅行筆記本電腦包高中大學(xué)生書包男潮流USb充電包包65199 黑色
4 159.00 七匹狼雙肩包 背包男15.6英寸電腦包商務(wù)休閑通勤防潑水牛津布書包 黑色B0301872-201
5 168.00 瑞士SWICKY瑞馳雙肩包男士背包新款大容量休閑商務(wù)旅行筆記本電腦包學(xué)生書包出差包USb充電包 黑色 大號帶usb送多功能刀+鎖
6 169.00 七匹狼背包男 牛津布雙肩包休閑簡約15.6寸電腦包時(shí)尚潮流旅行包大容量學(xué)生書包男 黑色B0301062-201
7 69.80 書包男士夜光雙肩背包中小學(xué)生男韓版休閑電腦包大學(xué)usb旅行包 USB大號音樂小子+筆袋+防盜鎖
8 159.00 第九城V.NINE 小學(xué)生書包男女孩兒童護(hù)脊書包1-3-6年級減負(fù)雙肩背包初中學(xué)生休閑書包 VD9BV33972J 藍(lán)配粉
9 79.00 京東超市第九城V.NINE 雙肩包男女卡通印花書包六件套帆布休閑背包校園中小學(xué)生書包 VB7BV32884J 粉色套裝
10 59.90 2020新款書包男背包女初中生開學(xué)包休閑簡約時(shí)尚潮流帆布包百搭高中學(xué)生 黑色
11 149.00 波斯丹頓雙肩包男士商務(wù)休閑潮流帆布學(xué)生校園運(yùn)動書包大容量旅行背包15.6英寸筆記本電腦包 男 深灰色
12 88.00 梵者 新款雙肩包男潮牌休閑帆布旅行包韓版男士背包商務(wù)電腦包高中初中大學(xué)生書包ins運(yùn)動潮流 黑色
13 149.00 愛登堡 雙肩包背包男士商務(wù)14寸電腦包休閑旅行包韓版多功能時(shí)尚潮流學(xué)生15.6寸筆記本包 黑色爆款 收藏加購 優(yōu)先發(fā)貨
14 159.00 第九城V.NINE 雙肩包女士防潑水旅行背包大容量15.6英寸電腦包校園情侶款大中學(xué)生書包男 VD7BV32881J 粉配灰
15 229.00 七匹狼雙肩包 男士背包電腦包15.6英寸筆記本休閑商務(wù)旅行學(xué)生書包黑色B248211-01IH1
16 79.00 耐拓 小學(xué)生書包男孩輕便減壓1-3-6年級兒童書包 N897寶藍(lán)大號3-6年級 均
17 69.00 雙肩包男士背包新款大容量休閑商務(wù)旅行筆記本電腦包學(xué)生書包出差包 黑色大號
18 159.00 第九城V.NINE 雙肩包男士大容量15.6英寸電腦包多功能旅行背包情侶款學(xué)生書包女 VD7BV33886J 米灰
19 355.00 七匹狼包商務(wù)雙肩包男韓版潮 大中學(xué)生書包背包 男包旅行包電腦包 黑色【五層款】
20 89.90 迪士尼（Disney）小學(xué)生書包男米奇中學(xué)生雙肩背包男女3-4-6年級兒童書包 DB96251深藍(lán)
21 69.00 叢林鳥（JUNGLE BIRD）書包女韓版初高中小學(xué)生簡約森系百搭尼龍雙肩包大容量背包 黑色
22 69.00 叢林鳥 書包男韓版原宿ulzzang初高中大學(xué)生時(shí)尚潮流雙肩包女大容量黑背包 黑色【送鴨子掛件】
23 99.00 京東超市十字勛章 瑞士雙肩包男15.6英寸筆記本電腦包商務(wù)多功能大容量出差背包旅行包防潑水休閑學(xué)生書包CR-9001黑色
24 229.00 Dickies 潮流休閑雙肩包男女學(xué)生書包大容量帆布包學(xué)院風(fēng)防水14/15.6英寸電腦包C028 黑色經(jīng)典款
25 188.00 李寧官方男子雙肩包背包書包訓(xùn)練系列ABSP388 黑-1（300180520mm）） 000
26 79.00 雙肩包潮牌書包男百搭時(shí)尚潮流背包青年韓版簡約文藝初中大學(xué)生書包 黑色 (433017高寬厚)送掛飾香包
27 28.00 小米（MI）炫彩小背包男女情侶雙肩包簡約便攜休閑旅游包旅行包學(xué)生小書包 小米炫彩小背包 黑色
28 59.00 格比森雙肩包 男士背包15.6英寸筆記本電腦包初高中大學(xué)生小學(xué)生書包男女新款 帆布防波水 深灰色
29 55.00 蒂梵森2020款雙肩男士商務(wù)休閑旅行背包大容量15.6寸筆記本電腦包潮流高中大學(xué)生書包男女外置USb 灰色
30 59.00 2020新款書包男女韓版 學(xué)院風(fēng)初高中學(xué)生書包潮流男款背包雙肩包個(gè)性時(shí)尚休閑電腦包 1810黑色

三 附上爬取的頁面源碼的一部分，這樣可以對照著輸出學(xué)習(xí)用

<div id="J_main" class="g-main2"><div class="m-list"><div class="ml-wrap"> <div id="J_filter" class="filter"><div class="f-line top"><div class="f-sort"> <a class="curr" href="javascript:;"><span class="fs-tit">綜合</span><em class="fs-down"><i class="arrow"></i></em></a><a class="" href="javascript:;"><span class="fs-tit">銷量</span><em class="fs-down"><i class="arrow"></i></em></a><a class="" href="javascript:;"><span class="fs-tit">評論數(shù)</span><em class="fs-down"><i class="arrow"></i></em></a><a class="" href="javascript:;"><span class="fs-tit">新品</span><em class="fs-down"><i class="arrow"></i></em></a><a class="" href="javascript:;"><span class="fs-tit">價(jià)格</span><em class="fs-up"><i class="arrow-top"></i><i class="arrow-bottom"></i></em></a></div> <div class="f-datagrid"><a href="javascript:;" class="fdg-item" data-range="0-55" data-tips="10%的用戶喜歡的價(jià)位"><span class="def-bar" style="height:21%"></span></a><a href="javascript:;" class="fdg-item" data-range="55-107" data-tips="30%的用戶喜歡的價(jià)位"><span class="def-bar" style="height:62%"></span></a><a href="javascript:;" class="fdg-item" data-range="107-198" data-tips="41%的用戶喜歡的價(jià)位"><span class="def-bar" style="height:85%"></span></a><a href="javascript:;" class="fdg-item" data-range="198-321" data-tips="13%的用戶喜歡的價(jià)位"><span class="def-bar" style="height:27%"></span></a><a href="javascript:;" class="fdg-item" data-range="321-￥" data-tips="6%的用戶喜歡的價(jià)位"><span class="def-bar" style="height:12%"></span></a></div> <div id="J_selectorPrice" class="f-price"><div class="f-price-set"><div class="fl"><input type="text" class="input-txt" autocomplete="off" style="color:#ccc" value="￥"></div><em>-</em><div class="fl"><input type="text" class="input-txt" autocomplete="off" style="color:#ccc" value="￥"></div></div><div class="f-price-edit"><a href="javascript:;" class="item1 J-price-cancle">清空</a><a href="javascript:;" class="item2 J-price-confirm" data-url="search?keyword=%E4%B9%A6%E5%8C%85&enc=utf-8&qrst=1&rt=1&stop=1&vt=2&wq=%E4%B9%A6%E5%8C%85&stock=1&ev=exprice_%7Bmin%7D-%7Bmax%7D%5E&uc=0#J_searchWrap">確定</a></div></div><div id="J_topPage" class="f-pager"><span class="fp-text"><b>1</b><em>/</em><i>100</i></span><a class="fp-prev disabled" href="javascript:;">&lt;</a><a class="fp-next" href="javascript:;">&gt;</a></div><div class="f-result-sum">共<span id="J_resCount" class="num">79萬+</span>件商品</div><span class="clr"></span></div><div class="f-line"><div class="f-store"><div class="fs-cell delivery-location">配送至</div><div id="J_store_selector" class="ui-area-wrap" style="float:left;margin-right:10px"><div class="ui-area-text-wrap"><div class="ui-area-text">北京朝陽區(qū)</div><b></b></div><div class="ui-area-content-wrap"><div class="ui-area-tab"></div><div class="ui-area-content"></div></div></div></div><div id="J_feature" class="f-feature"><ul><li><a data-field="wtype" data-val="1" class="" href="javascript:;" 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data-tips="本商品參與滿減促銷">每滿119-20</i> </div></div> </li> <li class="gl-item" data-sku="59975470952" data-spu="13810867851" data-pid="59975470952"><div class="gl-i-wrap"><div class="p-img"><a target="_blank" title="【好店認(rèn)證】【買一送“一”送鑰匙包】【支持7天無理由退換貨，贈送運(yùn)費(fèi)險(xiǎn)，售后無憂】【支持貨到付款】" href="//item.jd.com/59975470952.html" onclick="searchlog(1,59975470952,2,2,'','flagsClk=1094713996')"><img width="220" height="220" class="err-product" data-img="1" source-data-lazy-img="//img12.360buyimg.com/n7/jfs/t1/100706/25/17185/130140/5e8459f0Efbd3fdcf/379d9e03eea2a5d7.jpg" /> </a> <div data-lease="" data-catid="12071" data-venid="84618" data-presale=""></div></div><div class="p-scroll"><span class="ps-prev">&lt;</span><span class="ps-next">&gt;</span><div class="ps-wrap"><ul class="ps-main"><li class="ps-item"><a href="javascript:;" class="curr" title="黑色"><img data-presale="" data-sku="59975470952" data-img="1" 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data-lazy-img="//img12.360buyimg.com/n9/jfs/t1/111290/4/514/238523/5e8d3f62Eb2472c77/2bbdf53f323eb778.jpg" class="err-product" width="25" height="25" /></a></li><li class="ps-item"><a href="javascript:;" title="黑色|17.3英寸 容量升級"><img data-presale="" data-sku="100000540328" data-img="1" width="25" height="25" data-lazy-img="//img13.360buyimg.com/n9/jfs/t1/116012/34/344/220215/5e8af398E5ff3ff1c/520529d39bc26fa5.jpg" class="err-product" /></a></li><li class="ps-item"><a href="javascript:;" title="黑色|三倉加厚 容量升級"><img data-presale="" data-sku="7785841" data-img="1" width="25" height="25" data-lazy-img="//img11.360buyimg.com/n9/jfs/t1/111974/38/328/217556/5e8af36fE904f0699/4603afbe846a40dd.jpg" class="err-product" /></a></li></ul></div></div><div class="p-price"> <strong class="J_6511832" data-done="1"><em>￥</em><i>159.00</i></strong> </div><div class="p-name p-name-type-2"><a target="_blank" title="【七匹狼春雨行動，品質(zhì)盛典】4月7日-4月12日,每滿99減10元,滿99減10元,經(jīng)典源于用心,七匹狼品質(zhì)保證點(diǎn)擊選購！" href="//item.jd.com/6511832.html" onclick="searchlog(1,6511832,3,1,'','flagsClk=1077940872')"><em>七匹狼雙肩包 背包男15.6英寸電腦包商務(wù)休閑通勤防潑水牛津布<font class="skcolor_ljg">書包</font> 黑色B0301872-201</em><i class="promo-words" id="J_AD_6511832">【七匹狼春雨行動，品質(zhì)盛典】4月7日-4月12日,每滿99減10元,滿99減10元,經(jīng)典源于用心,七匹狼品質(zhì)保證點(diǎn)擊選購！</i></a></div>

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