python定向爬取淘宝商品价格

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

import requests
import re

def 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()

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。