本文实例讲述了python实现的爬取百度贴吧图片功能。分享给大家供大家参考，具体如下：
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#coding:utf-8
import requests
import urllib2
import urllib
```
from lxml import etree
class tieba:
def __init__(self):
self.tiebaname = raw_input("请输入需要爬取的贴吧:")
self.beginpage = int(raw_input("请输入爬取的起始页："))
self.endpage = int(raw_input("请输入爬取的结束页："))
self.baseurl = "http://tieba.baidu.com"
#self.headers = {"user-agent" : "mozilla/5.0 (windows nt 10.0; wow64) applewebkit/537.36 (khtml, like gecko) chrome/59.0.3071.86 safari/537.36"}
self.headers = {"user-agent" : "mozilla/5.0 (compatible; msie 9.0; windows nt 6.1 trident/5.0;"} def startwork(self):
"""
发送贴吧每一页的url请求
"""
for page in range(self.beginpage, self.endpage + 1):
pn = (page - 1) * 50
keyword = {"kw" : self.tiebaname, "pn" : pn}
kw = urllib.urlencode(keyword)
url = self.baseurl + "/f?" + kw
#print url
html = self.loadrequest(url)
self.loadpage(html)
def loadrequest(self, url):
"""
发送请求，返回响应
url: 发送请求的url地址
"""
request = urllib2.request(url, headers = self.headers)
#request = urllib2.request(url)
response = urllib2.urlopen(request)
return response.read()
def loadpage(self, html):
"""
提取每个帖子的url，并发送请求，获取响应
html: 贴吧每一页的html
"""
content = etree.html(html)
print '------'
print content
# xpath 返回的所有匹配成功后的结果的列表
#pagelink_list = content.xpath("//div[@class='threadlist_lz clearfix']/div/a[@class='j_th_tit']/@href")
pagelink_list = content.xpath("//div[@class='col2_right j_threadlist_li_right']//div/a/@href")
pagelink_list = content.xpath("//div[@class='t_con cleafix']//div/a/@href")
for link in pagelink_list:
print link
self.loadimage(self.loadrequest(self.baseurl + link))
def loadimage(self, html):
"""
提取帖子里用户发送的图片的url地址
html: 每个帖子的html
"""
content = etree.html(html)
imagelink_list = content.xpath("//div[@class='p_content ']//img[@class='bde_image']/@src")
for link in imagelink_list:
self.writeimage(self.loadrequest(link), link[-10:])
def writeimage(self, data, filename):
"""
将图片的响应数据，写入到本地磁盘里
data: 图片的响应数据
filename: 文件名(图片url的后10位)
"""
print "正在保存图片...%s" % filename
with open(filename, "wb") as f:
f.write(data)
if __name__ == "__main__":
tieba = tieba()
tieba.startwork()
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希望本文所述对大家python程序设计有所帮助。
原文链接：https://blog.csdn.net/xuezhangjun0121/article/details/73719059