Python实现的爬虫功能代码

yipeiwu_com5年前Python爬虫

本文实例讲述了Python实现的爬虫功能。分享给大家供大家参考,具体如下:

主要用到urllib2、BeautifulSoup模块

#encoding=utf-8
import re
import requests
import urllib2
import datetime
import MySQLdb
from bs4 import BeautifulSoup
import sys
reload(sys)
sys.setdefaultencoding("utf-8")
class Splider(object):
  def __init__(self):
  print u'开始爬取内容...'
  ##用来获取网页源代码
  def getsource(self,url):
  headers = {'User-Agent':'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2652.0 Safari/537.36'}
  req = urllib2.Request(url=url,headers=headers)
  socket = urllib2.urlopen(req)
  content = socket.read()
  socket.close()
  return content
  ##changepage用来生产不同页数的链接
  def changepage(self,url,total_page):
    now_page = int(re.search('page/(\d+)',url,re.S).group(1))
  page_group = []
  for i in range(now_page,total_page+1):
    link = re.sub('page/(\d+)','page/%d' % i,url,re.S)
    page_group.append(link)
  return page_group
  #获取字内容
  def getchildrencon(self,child_url):
  conobj = {}
  content = self.getsource(child_url)
  soup = BeautifulSoup(content, 'html.parser', from_encoding='utf-8')
  content = soup.find('div',{'class':'c-article_content'})
  img = re.findall('src="(.*?)"',str(content),re.S)
  conobj['con'] = content.get_text()
  conobj['img'] = (';').join(img)
  return conobj
  ##获取内容
  def getcontent(self,html_doc):
  soup = BeautifulSoup(html_doc, 'html.parser', from_encoding='utf-8')
  tag = soup.find_all('div',{'class':'promo-feed-headline'})
  info = {}
  i = 0
  for link in tag:
    info[i] = {}
    title_desc = link.find('h3')
    info[i]['title'] = title_desc.get_text()
    post_date = link.find('div',{'class':'post-date'})
    pos_d = post_date['data-date'][0:10]
    info[i]['content_time'] = pos_d
    info[i]['source'] = 'whowhatwear'
    source_link = link.find('a',href=re.compile(r"section=fashion-trends"))
    source_url = 'http://www.whowhatwear.com'+source_link['href']
    info[i]['source_url'] = source_url
    in_content = self.getsource(source_url)
    in_soup = BeautifulSoup(in_content, 'html.parser', from_encoding='utf-8')
    soup_content = in_soup.find('section',{'class':'widgets-list-content'})
    info[i]['content'] = soup_content.get_text().strip('\n')
    text_con = in_soup.find('section',{'class':'text'})
    summary = text_con.get_text().strip('\n') if text_con.text != None else NULL
    info[i]['summary'] = summary[0:200]+'...';
    img_list = re.findall('src="(.*?)"',str(soup_content),re.S)
    info[i]['imgs'] = (';').join(img_list)
    info[i]['create_time'] = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    i+=1
  #print info
  #exit()
  return info
  def saveinfo(self,content_info):
  conn = MySQLdb.Connect(host='127.0.0.1',user='root',passwd='123456',port=3306,db='test',charset='utf8')
  cursor = conn.cursor()
  for each in content_info:
    for k,v in each.items():
    sql = "insert into t_fashion_spider2(`title`,`summary`,`content`,`content_time`,`imgs`,`source`,`source_url`,`create_time`) values ('%s','%s','%s','%s','%s','%s','%s','%s')" % (MySQLdb.escape_string(v['title']),MySQLdb.escape_string(v['summary']),MySQLdb.escape_string(v['content']),v['content_time'],v['imgs'],v['source'],v['source_url'],v['create_time'])
    cursor.execute(sql)
  conn.commit()
  cursor.close()
  conn.close()
if __name__ == '__main__':
  classinfo = []
  p_num = 5
  url = 'http://www.whowhatwear.com/section/fashion-trends/page/1'
  jikesplider = Splider()
  all_links = jikesplider.changepage(url,p_num)
  for link in all_links:
  print u'正在处理页面:' + link
  html = jikesplider.getsource(link)
  info = jikesplider.getcontent(html)
  classinfo.append(info)
  jikesplider.saveinfo(classinfo)

更多关于Python相关内容可查看本站专题:《Python Socket编程技巧总结》、《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总

希望本文所述对大家Python程序设计有所帮助。

相关文章

Python爬虫使用脚本登录Github并查看信息

Python爬虫使用脚本登录Github并查看信息

前言分析目标网站的登录方式 目标地址: https://github.com/login    登录方式做出分析: 第一,用form表单方式提交信息, 第二...

Python实现的爬取网易动态评论操作示例

Python实现的爬取网易动态评论操作示例

本文实例讲述了Python实现的爬取网易动态评论操作。分享给大家供大家参考,具体如下: 打开网易的一条新闻的源代码后,发现并没有所要得评论内容。 经过学习后发现,源代码只是一个完整页面的...

Python爬虫图片懒加载技术 selenium和PhantomJS解析

一.什么是图片懒加载? - 案例分析:抓取站长素材http://sc.chinaz.com/中的图片数据 #!/usr/bin/env python # -*- coding:ut...

玩转python爬虫之cookie使用方法

玩转python爬虫之cookie使用方法

之前一篇文章我们学习了爬虫的异常处理问题,那么接下来我们一起来看一下Cookie的使用。 为什么要使用Cookie呢? Cookie,指某些网站为了辨别用户身份、进行session跟踪而...

python爬虫 基于requests模块的get请求实现详解

需求:爬取搜狗首页的页面数据 import requests # 1.指定url url = 'https://www.sogou.com/' # 2.发起get请求:get方法会返...