版权声明:转载请声明原文链接地址,谢谢! https://blog.csdn.net/weixin_42859280/article/details/84429707
可以实现功能的全部代码:
import requests
import re
def getHTMLText(url):
try:
r = requests.get(url, timeout = 30)
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{: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()
运行示例:
无论爬取什么网页都要先看看robots协议。
淘宝的robots协议:
User-agent: *
Disallow: /
但是,我们模仿人一样的频率去爬去就没事啦。
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
查看源代码:价格在view_prince里面。
要注意对齐的方式,这样就没错误:
但是这样就会报错: