我的第一个python爬虫程序

程序用来爬取糗事百科上的图片的,程序设有超时功能,具有异常处理能力

下面直接上源码:

#-*-coding:utf-8-*-

'''
Created on 2016年10月20日 @author: audi
''' import urllib2
import re
from bs4 import BeautifulSoup import sys
reload(sys)
sys.setdefaultencoding('utf-8') count = 0
path = "pic/tupian"
headers = {
'User-Agent':'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6'
}
for x in range(1,10):
temp_url = "http://www.qiushibaike.com/imgrank/page/%d"%x
req = urllib2.Request(
url = temp_url,
headers = headers
)
try:
data = urllib2.urlopen(req,timeout=10).read()
except:
print "打开页面链接超时!!!!"
continue
else:
print "打开页面成功,开始解析数据。。"
soup=BeautifulSoup(data,'html.parser',from_encoding='utf-8')
# 图片链接的div标签格式
# <div class="thumb">
# <a href="/article/117795261" target="_blank">
# <img src="http://pic.qiushibaike.com/system/pictures/11779/117795261/medium/app117795261.jpg" alt="我想变成妈妈的眼睛,这样我就可以一直粘在妈妈的身上">
# </a>
# </div>
# 查询所有图片所在的div标签内容
content = soup.find_all('div',class_ = 'thumb') #(jpg|JPG|jpeg)
# links集合存放最终的图片的链接
links = set()
# 再次过滤以获得图片的链接
for i in content:
temp_link = i.find_all('a',href=re.compile(r"/article/\d"))
temp_linnk = temp_link[0].find('img',src=re.compile(r"\.(jpg|JPG|jpeg)"))
temp_linnk = temp_linnk['src']
links.add(temp_linnk) for link in links:
try:
picData = urllib2.urlopen(link,timeout=3).read()
except:
print "当前子链接打开失败。。"
continue
else:
file_name = path + str(count) + '.jpg'
count +=1
f = file(file_name,"wb")
f.write(picData)
f.close()
print "爬取第" + str(count) + "个链接" + link print "恭喜你,爬取图片结束!!!!!!!!!!!!"

  

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