前因

豆瓣日记

先分析脚本结构，再用BeautifulSoup处理

#-*- coding:utf-8 -*-
import re
import requests
import numpy
from bs4 import BeautifulSoup
i=1#计数君
name="https://www.douban.com/people/petitespot/notes?start=30&type=note"#链接地^
#翻页的话把30改成40、50……
a= requests.get(name).text
soup = BeautifulSoup(a)

for url in soup.find_all("div", attrs={"class": "note-header-container"}):
    res = url.find(class_='j a_unfolder_n')
    link= res['href']#获取每篇文章的链接地址
    a= requests.get(link).text
    soup1 = BeautifulSoup(a)#第二个soup结构
    title=soup1.find("meta", attrs={"property": "og:title"})
    title=title['content']#获取title
    res= soup1.find("div", attrs={"id": "link-report"})
    st=" "
    for a in res.find_all('p'):#如果网页结构理想，便只有<p></p>
        st+='\n'
        st+=unicode(a.string)
    if st==" ":#否则简单处理，去掉<br>变为换行
        st=str(res)
        st=st.replace("<br/>","\n")
        string = str(i) + title + '.txt'
        fp = open(string, 'wb')
        fp.writelines(st)
        fp.close()
        i = i + 1
    else:
        string = str(i) + title + '.txt'
        fp = open(string, 'wb')
        fp.writelines(st.encode("u8"))
        fp.close()
        i = i + 1

新浪博客

新浪的编码特别奇怪，网上的.decode().encode处理之后仍然是乱码，最后还是机缘巧合找到了解决方案。
http://blog.chinaunix.net/uid-13869856-id-5747417.html
https://segmentfault.com/q/1010000000665231

#-*- coding:utf-8 -*-
import re
import requests
import numpy
import urllib
import urllib2
import chardet
import sys
import chardet
from bs4 import BeautifulSoup
i=1
reload(sys)
url = 'http://blog.sina.com.cn/s/articlelist_1270505543_0_1.html'
req = requests.get(url)
if req.encoding == 'ISO-8859-1':
    encodings = requests.utils.get_encodings_from_content(req.text)
    if encodings:
        encoding = encodings[0]
    else:
        encoding = req.apparent_encoding
encode_content = req.content.decode(encoding, 'replace').encode('utf-8', 'replace')

soup = BeautifulSoup(encode_content,'html5lib')
#必须是html5lib，否则会损失信息

for url in soup.find_all("p", attrs={"class": "atc_main SG_dot"}):
    if i<=36:
        i=i+1
        continue
    res = url.find(target='_blank')
    link= res['href']
    a= requests.get(link)
    encodings = requests.utils.get_encodings_from_content(a.text)
    encoding = encodings[0]
    content = a.content.decode(encoding, 'replace').encode('utf-8', 'replace')
    soup1 = BeautifulSoup(content, 'html5lib')
    title=soup1.title.string
    res= soup1.find("div", attrs={"id": "sina_keyword_ad_area2"})
    st=" "
    st=str(res)
    string = str(i) + title + '.html'
    fp = open(string, 'wb')
    fp.writelines(st)
    fp.close()
    i = i + 1

由于新浪的正文中出现大量html结构，只好用html格式存储，没有转换成txt文本。