Python 简单爬虫抓取糗事百科

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1	# coding:utf-8

import time
import random
import urllib2
from bs4 import BeautifulSoup
#引入 beautifulsoup模块

#p = 1
#定义 页
url = 'http://www.qiushibaike.com/text/page/'
#定义header
my_headers = [
    'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0',
    'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)',
    'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)',
    'ELinks/0.12pre5 (textmode; Linux; -)'
]


#获取网页内容
def get_con(url, headers):
    random_header = random.choice(headers)
    req = urllib2.Request(url)
    req.add_header('User-Agent', random_header)
    req.add_header('Host', 'www.qiushibaike.com')
    req.add_header(
        'Referer', 'http://www.qiushibaike.com/')
    req.add_header('GET', 'url')
    content = urllib2.urlopen(req).read()
    return content


#读取每一条信息
def get_txt(haha):
    soup = BeautifulSoup(haha)
    all_txt = soup.find_all('div', class_="content")
    i = 1
    for txt in all_txt:
        cont = str(txt)
        head = cont.find(r'class="content"')
        end = cont.find(r'</div', head)
        con = cont[head + 16:end]
        print str(i), con
        i = i + 1
        time.sleep(3)
#根据输入的数字，确定打印起始页

page = raw_input("Please input a number:")
p = int(page)

#使用while循环打印出所有信息
while p < 36:
    haha = get_con(url + str(p) + '?s=4796159', my_headers)
    print get_txt(haha)
    print "这是第" + str(p) + "页"
    p = p + 1