Python小爬虫实例

有几个注意点:

# -*- coding: utf-8 -*- 
# func passport jw.qdu.edu.cn
import re
import urllib
# python3后urllib.request代替urllib2
import urllib.request import json from bs4 import BeautifulSoup class taofen: def getHtml(self , pageurl): # 获取网站html代码 req = urllib.request.Request(pageurl , headers = { 'Connection': 'Keep-Alive', 'Accept': 'text/html, application/xhtml+xml, */*', 'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3', 'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko' }) _respose = urllib.request.urlopen(req , timeout = 2) try: html = _respose.read().decode('UTF-8').replace('&nbsp','') except Exception as e: pass return html def getKind(self , html): soup = BeautifulSoup(html , "html.parser") liList = soup.find_all('li') res = [] for li in liList: if li.img and li.find(class_ = "change_price"): img = li.img.attrs['original'] name = li.img.attrs['alt'] price = li.find(class_ = "change_price").string resNode = {'img':img,'name':name,'price':price} res.append(resNode) return res if __name__ == "__main__": taofen = taofen() html = taofen.getHtml("http://www.taofen8.com/promcat-4/cat-300/subcat-0/page-1/order-3/sp-2") res = taofen.getKind(html) #ensure_ascii=False将utf-8编码的中文正确显示 res = json.dumps(res , ensure_ascii = False) print(res)

 

posted @ 2015-09-22 21:01  orlion  阅读(317)  评论(0编辑  收藏  举报