文／bluescorpio
爬蟲四部曲：
1.從哪爬 where
2.爬什么 what
3.怎么爬 how
4.爬了之后信息如何保存 save
本文是練手程序之爬取三國演義
從哪爬
爬什么
三國演義全文
怎么爬
在Chrome頁面打開F12，就可以發現文章內容在節點
<div id="con" class="bookyuanjiao">
只要找到這個節點，然后把內容寫入到一個html文件即可。
content = soup.find("div", {"class": "bookyuanjiao", "id": "con"})
爬了之后如何保存
主要就是拿到內容，拼接到一個html文件，然后保存下來就可以了。
#!usr/bin/env
# -*-coding:utf-8 -*-
import urllib2
import os
from bs4
import BeautifulSoup as BS
import localeimpoyt sys
from lxml
import tree
import rereload(sys)sys.setdefaultencoding('gbk’)
sub_folder = os.path.join(os.getcwd(), "sanguoyanyi”)
if not os.path.exists(sub_folder):
os.mkdir(sub_folder)
path = sub_folder
# customize html as head of the articles
input = open(r'0.html', 'r’)
head = input.read()
domain = 'http://www.shicimingju.com/book/sanguoyanyi.html'
t = domain.find(r'.html’)
new_domain = '/'.join(domain.split("/")[:-2])
first_chapter_url = domain[:t] + "/" + str(1) + '.html’
print first_chapter_url
# Get url if chapter lists
req = urllib2.Request(url=domain)
resp = urllib2.urlopen(req)
html = resp.read()
soup = BS(html, 'lxml’)
chapter_list = soup.find("div", {"class": "bookyuanjiao", "id": "mulu”})
sel = etree.HTML(str(chapter_list))
result = sel.xpath('//li/a/@href’)
for each_link in result:
each_chapter_link = new_domain + "/" +
each_link
print each_chapter_link
req = urllib2.Request(url=each_chapter_link)
resp = urllib2.urlopen(req)
html = resp.read()
soup = BS(html, 'lxml')
content = soup.find("div", {"class": "bookyuanjiao", "id": "con"})
title = soup.
title.text title = title.split(u'_《三國演義》_詩詞名句網')[0]
html = str(content)
html = head + html + "</body></html>"
filename = path + "\\" + title + ".html"
print filename
# write file
output = open(filename, 'w')
output.write(html) output.close()```
0.html的內容如下
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body>
今年**第六屆大會PyConChina2016**，由PyChina.org發起，CPyUG/TopGeek 等社區協辦，將在2016年9月10日（上海）9月23日（深圳）10月15日（北京）地舉辦的針對Python開發者所舉辦的最盛大和權威的Python相關技術會議，由PyChina社區主辦，致力于推動各類Python相關的技術在互聯網、企業應用等領域的研發和應用。
您可以點擊[此處](http://www.huodongxing.com/go/pycon2016sh)
了解更多詳情，或者掃描下圖二維碼：
