Python爬虫实现使用beautifulSoup4爬取名言网功能案例

#! /usr/bin/python3
# -*- coding:utf-8 -*-
from urllib.request import urlopen as open
from bs4 import BeautifulSoup
import re
import pymysql
def find_top_ten(url):
  response = open(url)
  bs = BeautifulSoup(response,'html.parser')
  tags = bs.select('span.tag-item a')
  top_ten_href = [tag.get('href') for tag in tags]
  top_ten_tag = [tag.text for tag in tags]
  # print(top_ten_href)
  # print(top_ten_tag)
  return top_ten_href
def insert_into_mysql(records):
  con = pymysql.connect(host='localhost',user='root',password='root',database='quotes',charset='utf8',port=3306)
  cursor = con.cursor()
  sql = "insert into quotes(content,author,tags) values(%s,%s,%s)"
  for record in records:
    cursor.execute(sql, record)
  con.commit()
  cursor.close()
  con.close()
# http://quotes.toscrape.com/tag/love/
#要获取对应标签中所有的名言 所以这里要考虑分页的情况
#经过在网页上查看知道分页查询的url
#http://quotes.toscrape.com/tag/love/page/1/
#判断到那一页没有数据 div.container div.row [1]
def find_link_content(link):
  page = 1
  while True:
    new_link = "http://quotes.toscrape.com" + link + "page/"
    # print(new_link)
    new_link = new_link + str(page)
    print(new_link)
    sub_bs = open(new_link)
    sub_bs = BeautifulSoup(sub_bs,'html.parser')
    quotes = sub_bs.select('div.row div.col-md-8 span.text')
    # 如果没有数据就退出
    if len(quotes) == 0:
      break
    #名言
    quotes = [quote.text.strip('“”') for quote in quotes]
    #作者
    authors = sub_bs.select('small.author')
    authors = [author.text for author in authors]
    # 标签
    tags_list = sub_bs.select('meta.keywords')
    tags_list = [tags.get('content') for tags in tags_list]
    # print(authors)
    # print(quotes)
    #print(tags_list)
    record_list = []
    for i in range(len(quotes)):
      tags = tags_list[i]
      tags = tags.replace(',','，')
      print(tags)
      record = [quotes[i],authors[i],tags]
      record_list.append(record)
    insert_into_mysql(record_list)
    page += 1
#
def main():
  url = "http://quotes.toscrape.com/"
  parent_link = find_top_ten(url)
  for link in parent_link:
    print(link)
    find_link_content(link)
if __name__ == '__main__':
  main()