python爬虫学习之定向爬取淘宝商品价格，供大家参考，具体内容如下
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import requestsimport redef getHTMLText(url): try: r = requests.get(url, timeout=30) r.raise_for_status() #如果发送了一个失败请求(非200响应),#我们可以通过 Response.raise_for_status() 来抛出异常: r.encoding= r.apparent_encoding return r.text except: return ""def parsePage(ilt,html): try: plt = re.findall(r'\"view_price\"\:\"[\d\.]*?\"',html) #正则表达式来匹配 "view_price":"\d\."类型的字符串 tlt = re.findall(r'\"raw_title\"\:\".*?\"',html)#正则表达式来匹配 "raw_title":".*?"类型的字符串,.*?是任意字符的最小匹配 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{:16}" 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 = 2 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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原文链接：http://blog.csdn.net/learn_is_happy/article/details/78773956
