python爬虫之BeautifulSoup

# -*- coding: UTF-8 -*-
import re
from bs4 import BeautifulSoup
import requests
import codecs
import sys  
reload(sys)  
sys.setdefaultencoding('utf8') 

def mei_url():
    url = 'http://mdl.com/product'
    web_data = requests.get(url)
    web_data.encoding = 'utf-8'
    soup = BeautifulSoup(web_data.text, 'lxml')
    return soup
    
def mei_info(sub_url='/product/item/293410'):
    url = 'http://mdl.com'+sub_url
    web_data = requests.get(url)
    web_data.encoding = 'utf-8'
    soup = BeautifulSoup(web_data.text, 'lxml')
    title=soup.select('#main > div.boundary > div > div.container__main > div.section.section-info.clearfix > h2')[0].get_text()
    introduce=soup.select('#main > div.boundary > div > div.container__main > div.section.section-intro.clearfix > div > div.section-intro__item__body.rich-text')[0].get_text()
    effect=soup.select('#main > div.boundary > div > div.container__main > div.section.section-intro.clearfix > div > div.section-intro__item__body.rich-text > span')[0].get_text()
    crowd=soup.select('#main > div.boundary > div > div.container__main > div.section.section-intro.clearfix > div > div.section-intro__item__body.rich-text')[2].get_text()
    print  title
    with codecs.open(r'E:\note\mei_infov3.txt', "a+",'utf8') as file: 
        file.write('&'.join(map(lambda x:str(x),[title,introduce,effect,crowd])))
        file.write('\n')
        file.write('$')
if __name__=='__main__':
    
    # items=mei_url()
    # items=str(items)
    soup1 = BeautifulSoup(open(r'E:\note\mei.htm'),'lxml')
    items1=str(soup1)
    url_list1=re.findall(r'/product/item/\d{6}',items1 )
    soup2 = BeautifulSoup(open(r'E:\note\mei2.htm'),'lxml')
    items2=str(soup2)
    url_list2=re.findall(r'/product/item/\d{6}',items2 )
    url_list3=url_list1+url_list2
    print len(url_list3)
    for sub_url in url_list3:
        mei_info(sub_url)