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()

来源：http://blog.csdn.net/learn_is_happy/article/details/78773956