Python implemented crawler function code

This article illustrates the crawler function implemented by Python. To share for your reference, specific as follows:

urllib2 and BeautifulSoup modules are mainly used

#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' Start crawling the contents ...'
  ## Used to obtain web page source code 
  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 Links used to produce different pages 
  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
  # Get word content 
  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
  ## Access to content 
  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' Page being processed: ' + link
  html = jikesplider.getsource(link)
  info = jikesplider.getcontent(html)
  classinfo.append(info)
  jikesplider.saveinfo(classinfo)

For more information about Python, please refer to Python Socket Programming Skills Summary, Python Data Structure and Algorithm Tutorial, Python Function Using Skills Summary, Python String Operation Skills Summary, Python Introduction and Advanced Classic Tutorial and Python File and Directory Operation Skills Summary.

I hope this article has been helpful for Python programming.