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pythoncrawler1's Introduction

一个python爬虫小程序

起因

深夜忽然想下载一点电子书来扩充一下kindle,就想起来python学得太浅,什么“装饰器”啊、“多线程”啊都没有学到。

想到廖雪峰大神的python教程很经典、很著名。就想找找有木有pdf版的下载,结果居然没找到!!CSDN有个不完整的还骗走了我一个积分!!尼玛!!

怒了,准备写个程序直接去爬廖雪峰的教程,然后再html转成电子书。

过程

过程很有趣呢,用浅薄的python知识,写python程序,去爬python教程,来学习python。想想有点小激动……

果然python很是方便,50行左右就OK了。直接贴代码:

# coding:utf-8
import urllib

domain = 'http://www.liaoxuefeng.com'           #廖雪峰的域名
path = r'C:\Users\cyhhao2013\Desktop\temp\\'    #html要保存的路径

# 一个html的头文件
input = open(r'C:\Users\cyhhao2013\Desktop\0.html', 'r')
head = input.read()

# 打开python教程主界面
f = urllib.urlopen("http://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000")
home = f.read()
f.close()

# 替换所有空格回车(这样容易好获取url)
geturl = home.replace("\n", "")
geturl = geturl.replace(" ", "")

# 得到包含url的字符串
list = geturl.split(r'em;"><ahref="')[1:]

# 强迫症犯了,一定要把第一个页面也加进去才完美
list.insert(0, '/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000">')

# 开始遍历url List
for li in list:
    url = li.split(r'">')[0]
    url = domain + url              #拼凑url
    print url
    f = urllib.urlopen(url)
    html = f.read()

    # 获得title为了写文件名
    title = html.split("<title>")[1]
    title = title.split(" - 廖雪峰的官方网站</title>")[0]

    # 要转一下码,不然加到路径里就悲剧了
    title = title.decode('utf-8').replace("/", " ")

    # 截取正文
    html = html.split(r'<!-- block main -->')[1]
    html = html.split(r'<h4>您的支持是作者写作最大的动力!</h4>')[0]
    html = html.replace(r'src="', 'src="' + domain)

    # 加上头和尾组成完整的html
    html = head + html+"</body></html>"

    # 输出文件
    output = open(path + "%d" % list.index(li) + title + '.html', 'w')
    output.write(html)
    output.close()

简直,人生苦短我用python啊!

最后

附上HTML转epub电子书格式在线链接:html.toepub.com

以及廖雪峰的教程:链接 廖雪峰的Git教程也非常非常的不错哦~

顺便扩充一下自己的→_→GitHub(爬下来的html也在github上哦~)

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pythoncrawler1's Issues

生成问题

你好,我成功运行了你的程序,但用网站转换之后生成的epub没有图片,有什么好办法吗?

能否提供适用phthon3的代码?

您好,我是初学者,仅仅看到廖雪峰python教程的“函数”这一章。
感谢你的这个爬虫程序,我也想把他的教程爬下来,打印着看,可惜我安装的是python3的环境。请问您可以稍稍修改成适用python3的教程吗?谢谢!(我在python3里照着你的代码运行,然后根据报错信息在google解决方案,无奈错误太多,我看不懂了。。。)

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