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 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()
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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服务器之家。
原文链接：http://blog.csdn.net/learn_is_happy/article/details/78773956