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import re
import urllib
import urllib.request
from collections import deque
queue = deque()#存放待爬取的网址
visited = set()#存放爬取过的网址。判断是否爬取过
url = "http://news.dbanotes.net"#入口网站
queue.append(url)
count = 1
while queue:
url = queue.popleft()#删除已经爬取过的队首的网址url
visited |= {url}#把已经爬取过的页面放入set中，方便下面的判断
urlop = urllib.request.urlopen(url)
if ‘html‘ not in urlop.getheader(‘Content-Type‘):
continue#如果是html再继续爬取
try:
data = urlop.read().decode(‘utf-8‘)
except:
continue
value = re.findall(r‘href="(.+?)"‘,data)
for x in value:
if ‘http‘ in x and x not in visited:
print("加入队列：" + x)
钟志远 江苏南京 904727147
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原文地址：http://my.oschina.net/u/2391943/blog/487567
