我们今天来用Python爬虫爬取金庸所有的武侠小说，网址为：http://jinyong.zuopinj.com/，网页如下：
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Python代码如下：
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1 # -- coding: utf-8 --
2 import urllib.request 3 from bs4 import BeautifulSoup 4
5 #get book's chapter
6 def get_chapter(url): 7 html = urllib.request.urlopen(url) 8 content = html.read().decode('utf8')
9 html.close() 10 soup = BeautifulSoup(content, "lxml") 11 title = soup.find('h1').text #chapter title
12 text = soup.find('div', id='htmlContent') #chapter content
13 #processing the content to get nice style
14 content = text.get_text('\n','br/').replace('\n', '\n ') 15 content = content.replace(' ', '\n ') 16 return title, ' '+content 17
18 def main(): 19 books = ['射雕英雄传','天龙八部','鹿鼎记','神雕侠侣','笑傲江湖','碧血剑','倚天屠龙记',\ 20 '飞狐外传','书剑恩仇录','连城诀','侠客行','越女剑','鸳鸯刀','白马啸西风',\ 21 '雪山飞狐'] 22 order = [1,2,3,4,5,6,7,8,10,11,12,14,15,13,9] #order of books to scrapy
23 #list to store each book's scrapying range
24 page_range = [1,43,94,145,185,225,248,289,309,329,341,362,363,364,375,385] 25
26 for i,book in enumerate(books):
27 for num in range(page_range[i],page_range[i+1]):
28 url = "http://jinyong.zuopinj.com/%s/%s.html"%(order[i],num)
29 try:
30 title, chapter = get_chapter(url)
31 with open('E://%s.txt'%book, 'a', encoding='gb18030') as f:
32 print(book+':'+title+'-->写入成功！')
33 f.write(title+'\n\n\n')
34 f.write(chapter+'\n\n\n')
35 except Exception as e:
36 print(e)
37 print('全部写入完毕!')
38
39 main()</pre>
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运行结果如下：
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上面的运行结果“HTTP Error 404: Not Found”是因为这个网页不存在，并不影响书本内容的完整性。我们可以去E盘查看文件是否下载成功：
image
· 15本书都下载完毕了！整个过程才用了不到10分钟！爬虫的力量真是伟大啊~~
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