Python爬虫--抓取糗事百科段子

 1 # -*- coding:utf-8 -*-
 2 __author__ = ‘Jz‘
 3 import urllib2
 4 import re
 5 
 6 #糗事百科爬虫类
 7 class QSBK:
 8     #初始化
 9     def __init__(self):
10         self.pageIndex = 1
11         self.user_agent = ‘Mozilla/5.0 (Windows NT 6.1; WOW64)‘
12         self.headers = {‘User-Agent‘: self.user_agent}
13         #joke的每一个元素是每一页的段子
14         self.joke = []
15         #判断是否继续运行
16         self.enable = False
17     
18     def getPage(self, pageIndex):
19         try:
20             URL = ‘http://www.qiushibaike.com/hot/page/‘ + str(pageIndex)
21             request = urllib2.Request(url = URL, headers = self.headers)
22             response = urllib2.urlopen(request)
23             pageContent = response.read().decode(‘utf-8‘)
24             return pageContent
25         except urllib2.URLError, e:
26             if hasattr(e, ‘reason‘):
27                 print ‘段子抓取失败，失败原因：‘, e.reason
28                 return None
29     
30     def getJokeList(self, pageIndex):
31         pageContent = self.getPage(pageIndex)
32         if not pageContent:
33             print ‘段子获取失败...‘
34             return None
35         #第三个组中的内容用于判断段子是否附带图片
36         pattern = re.compile(r‘<div.*?class="author">.*?<a.*?>.*?<img.*?/>\n(.*?)\n</a>.*?</div>.*?<div class="content">\n\n(.*?)\n<!--.*?-->.*?</div>‘ +
37                          r‘(.*?)class="stats">.*?<span.*?class="stats-vote"><i.*?class="number">(.*?)</i>‘
38                          , re.S)
39         jokes = re.findall(pattern, pageContent)
40         pageJokes = []
41         #过滤带有图片的段子
42         for joke in jokes:
43             hasImg = re.search(‘img‘, joke[2])
44             #joke[0]为发布人,joke[1]为段子内容,joke[3]为点赞数量
45             if not hasImg:
46                 pageJokes.append([joke[0].strip(), joke[1].strip(), joke[3].strip()])
47         return pageJokes
48     
49     def loadPage(self):
50         if self.enable == True:
51             #若当前已看的页数少于两页，则加载新的一页
52             if len(self.joke) < 2:
53                 pageJokes = self.getJokeList(self.pageIndex)
54                 if pageJokes:
55                     self.joke.append(pageJokes)
56                     self.pageIndex += 1
57     
58     #每输入一次回车，打印一条段子
59     def getOneJoke(self, pageJokes, page):
60         jokes = pageJokes
61         for joke in jokes:
62             userInput = raw_input(‘请输入回车键或Q/q: ‘)
63             self.loadPage()
64             if userInput == ‘Q‘ or userInput == ‘q‘:
65                 self.enable = False
66                 print ‘退出爬虫...‘
67                 return
68             print u‘段子内容:%s\n第%d页\t发布人:%s\t赞:%s‘ % (joke[1], page, joke[0], joke[2])
69         
70     def start(self):
71         print ‘正在从糗事百科抓取段子，按回车键查看新段子，按Q/q退出...‘
72         self.enable = True
73         self.loadPage()
74         page = 0
75         while self.enable:
76             if len(self.joke) > 0:
77                 pageJokes = self.joke[0]
78                 page += 1
79                 #删除已经读取过的段子页
80                 del self.joke[0]
81                 self.getOneJoke(pageJokes, page)
82 
83 spider = QSBK()
84 spider.start()

Traceback (most recent call last):
  File "D:\coding_file\python_file\TestPython\src\Test\QSBK.py", line 84, in <module>
    spider.start()
  File "D:\coding_file\python_file\TestPython\src\Test\QSBK.py", line 81, in start
    self.getOneJoke(pageJokes, page)
  File "D:\coding_file\python_file\TestPython\src\Test\QSBK.py", line 68, in getOneJoke
    print ‘段子内容:%s\n第%d页\t发布人:%s\t赞:%s‘ % (joke[1], page, joke[0], joke[2])
UnicodeDecodeError: ‘ascii‘ codec can‘t decode byte 0xe7 in position 3: ordinal not in range(128)