python实现一个栏目的分页抓取列表页抓取

python实现一个栏目的分页抓取列表页抓取

#!/usr/bin/env python

# coding=utf-8

import requests

from bs4 import BeautifulSoup

import pymysql

import sys, io

sys.stdout = io.TextIOWrapper(sys.stdout.buffer,encoding='utf8') # Change default encoding to utf8

print('连接到mysql服务器...')

db = pymysql.connect("localhost","root","root","python")

print('连接上了!')

cursor = db.cursor()

hdrs = {'User-Agent':'Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)'}

def has_class_but_no_id(tag):

    return tag.has_attr('title') and tag.has_attr('href') and not tag.has_attr('target')

urls = ['http://www.zztez.com/tezgl/list_1_{}.html'.format(str(i)) for i in range(5,11)]

for url in urls:

    print(url)

    r = requests.get(url, headers = hdrs)

    soup = BeautifulSoup(r.content.decode('gbk', 'ignore'), 'lxml')

    for link in soup.find_all(has_class_but_no_id):

                url="http://www.zztez.com" + link.get('href')

                r = requests.get(url, headers = hdrs)

                soup = BeautifulSoup(r.content.decode('gbk', 'ignore'), 'lxml')

                title=soup.find("h1")

                title=title.string.encode("utf-8")

                intro=soup.select(".intro")

                rintro=intro[0].string.encode("utf-8")

                content=soup.select(".content")

                rcontent=content[0].encode("utf-8")

                #查询数据

                sql="SELECT count(*) as total FROM article WHERE title like %s"

                data=(title)

                row_affected=cursor.execute(sql,data)

                one=cursor.fetchone()

                if one==(0,):

                    insert = ("INSERT INTO article(title,intro,content)" "VALUES(%s,%s,%s)")

                    data = (title, rintro, rcontent)

                    cursor.execute(insert, data)

                    db.commit()

print('爬取数据并插入mysql数据库完成...')