Python淘宝商品比价定向爬虫,这个外包值五百吗?
1.项目基本信息
目标: 获取淘宝搜索页面的信息,提取其中的商品名称和价格
理解: 淘宝的搜索接口、翻页的处理
URL样式:
2.程序的结构设计
步骤1:提交商品搜索请求,循环获取页面
步骤2:对于每个页面,提取商品名称和价格信息
步骤3:将信息输出到屏幕上
3.Cookie内容的获取
由于淘宝的反爬机制,需要修改请求头,添加Cookie信息
运行结果:
4.代码
import requests import re def getHTMLText(url): try: # \连接多行 cookie_content = "miid=892389301891538214;cna=hnaTFWsdyW0CAXOXQdBBG5tX;\ isg=BLq60XalsXGNxj9VtCMK9zU6CODcaz5FjG8jisSzZs0Yt1rxrPuOVYDFA8NrPLbd;\ l=eBMzSVePqmS6XnjtBOfahurza77OSIOYYuPzaNbMiOCP_yfB5sONWZP-fYL6C31Vh6XJR3PXGizJBeYBqQAonxv92j-la_kmn;\ thw=cn; tfstk=cQdhB7bxgpWBz-kNMX1Blg1Sq2lAwNUFAtBw_CbpYp-U951mnRyVFGqCbAbYF;\ hng=CN%7Czh-CN%7CCNY%7C156; sgcookie=E4hGC1l%2FtzyLC76w2ysFN;\ tracknick=1234%5Cu75AF83386591;\ _cc_=WqG3DMC9EA%3D%3D;\ enc=ZXXKNl9itH049IdhJK2eMYLeK8%2FfcD3I1SIxwNzqIUCy8gm3lVnGIklgip9oskesaOCKOk1XtRfY96Hi%2F%2FhdKw%3D%3D;\ JSESSIONID=7B337485B801F235F7A9BE3504D975E1" kv = {'cookie':cookie_content,'User-agent':'Mozilla/5.0'} r = requests.get(url, timeout = 30, headers = kv) r.raise_for_status() r.encoding = r.apparent_encoding return r.text except: return "" def parsePage(ilt, html): try: plt = re.findall(r'\"view_price\"\:\"[\d\.]*\"',html) tlt = re.findall(r'\"raw_title\"\:\".*?\"',html) for i in range(len(plt)): price = eval(plt[i].split(':')[1]) title = eval(tlt[i].split(':')[1]) ilt.append([price , title]) except: print("") def printGoodsList(ilt): tplt = "{:4}\t{:8}\t{:20}" print(tplt.format("序号", "价格", "商品名称")) count = 0 for g in ilt: count = count + 1 print(tplt.format(count, g[0], g[1])) def main(): goods = '书包' depth = 3 start_url = 'https://s.taobao.com/search?q=' + goods infoList = [] for i in range(depth): try: url = start_url + '&s=' + str(44*i) html = getHTMLText(url) parsePage(infoList, html) except: continue printGoodsList(infoList) main()1.项目基本信息 目标: 获取淘宝搜索页面的信息,提取其中的商品名称和价格 理解: 淘宝的搜索接口、翻页的处理 URL样式: 在这里插入图片描述 2.程序的结构设计 步骤1:提交商品搜索请求,循环获取页面 步骤2:对于每个页面,提取商品名称和价格信息 步骤3:将信息输出到屏幕上 3.Cookie内容的获取 由于淘宝的反爬机制,需要修改请求头,添加Cookie信息 在这里插入图片描述在这里插入图片描述 运行结果: 在这里插入图片描述 4.代码 import requests import re def getHTMLText(url): try: # \连接多行 cookie_content = "miid=892389301891538214;cna=hnaTFWsdyW0CAXOXQdBBG5tX;\ isg=BLq60XalsXGNxj9VtCMK9zU6CODcaz5FjG8jisSzZs0Yt1rxrPuOVYDFA8NrPLbd;\ l=eBMzSVePqmS6XnjtBOfahurza77OSIOYYuPzaNbMiOCP_yfB5sONWZP-fYL6C31Vh6XJR3PXGizJBeYBqQAonxv92j-la_kmn;\ thw=cn; tfstk=cQdhB7bxgpWBz-kNMX1Blg1Sq2lAwNUFAtBw_CbpYp-U951mnRyVFGqCbAbYF;\ hng=CN%7Czh-CN%7CCNY%7C156; sgcookie=E4hGC1l%2FtzyLC76w2ysFN;\ tracknick=1234%5Cu75AF83386591;\ _cc_=WqG3DMC9EA%3D%3D;\ enc=ZXXKNl9itH049IdhJK2eMYLeK8%2FfcD3I1SIxwNzqIUCy8gm3lVnGIklgip9oskesaOCKOk1XtRfY96Hi%2F%2FhdKw%3D%3D;\ JSESSIONID=7B337485B801F235F7A9BE3504D975E1" kv = {'cookie':cookie_content,'User-agent':'Mozilla/5.0'} r = requests.get(url, timeout = 30, headers = kv) r.raise_for_status() r.encoding = r.apparent_encoding return r.text except: return "" def parsePage(ilt, html): try: plt = re.findall(r'\"view_price\"\:\"[\d\.]*\"',html) tlt = re.findall(r'\"raw_title\"\:\".*?\"',html) for i in range(len(plt)): price = eval(plt[i].split(':')[1]) title = eval(tlt[i].split(':')[1]) ilt.append([price , title]) except: print("") def printGoodsList(ilt): tplt = "{:4}\t{:8}\t{:20}" print(tplt.format("序号", "价格", "商品名称")) count = 0 for g in ilt: count = count + 1 print(tplt.format(count, g[0], g[1])) def main(): goods = '书包' depth = 3 start_url = 'https://s.taobao.com/search?q=' + goods infoList = [] for i in range(depth): try: url = start_url + '&s=' + str(44*i) html = getHTMLText(url) parsePage(infoList, html) except: continue printGoodsList(infoList) main()
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