这篇文章主要介绍了三个python爬虫项目实例代码，使用了urllib2库，文中示例代码非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友可以参考下。

python爬虫代码示例分享

一、爬取故事段子：推荐学习：Python视频教程

注：部分代码无法正常运行，但仍有一定的参考价值。

#encoding=utf-8import urllib2 import re  class neihanba():  def spider(self):    &#39;&#39;&#39;    爬虫的主调度器    &#39;&#39;&#39;    isflow=True#判断是否进行下一页    page=1    while isflow:      url="http://www.neihanpa.com/article/list_5_"+str(page)+".html"      html=self.load(url)      self.deal(html,page)      panduan=raw_input("是否继续(y/n)!")      if panduan=="y":        isflow=True        page+=1      else:        isflow=False  def load(self,url):    &#39;&#39;&#39;    针对url地址进行全部爬去    :param url: url地址    :return: 返回爬去的内容    &#39;&#39;&#39;    header = {      "User-Agent": " Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36"    }    request = urllib2.Request(url, headers=header)    response = urllib2.urlopen(request)    html = response.read()    return html  def deal(self,html,page):    &#39;&#39;&#39;    对之前爬去的内容进行正则匹配，匹配出标题和正文内容    :param html:之前爬去的内容    :param page: 正在爬去的页码    &#39;&#39;&#39;    parrten=re.compile(&#39;<li class="piclist\d+">(.*?)</li>&#39;,re.S)    titleList=parrten.findall(html)    for title in titleList:      parrten1=re.compile(&#39;<a href="/article/\d+.html" rel="external nofollow" >(.*)</a>&#39;)      ti1=parrten1.findall(title)      parrten2=re.compile(&#39;<p class="f18 mb20">(.*?)</p>&#39;,re.S)      til2=parrten2.findall(title)      for t in ti1:        tr=t.ｒｅｐｌａｃｅ("<b>","").ｒｅｐｌａｃｅ("</b>","")        self.writeData(tr,page)      for t in til2:        tr=t.ｒｅｐｌａｃｅ("<p>","").ｒｅｐｌａｃｅ("</p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/00968c3c2c15" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">Python免费学习笔记（深入）</a>”；</p>","").ｒｅｐｌａｃｅ("<br>","").ｒｅｐｌａｃｅ("<br />","").ｒｅｐｌａｃｅ("&ldquo","\"").ｒｅｐｌａｃｅ("&rdquo","\"")        self.writeData(tr,page)  def writeData(self,context,page):    &#39;&#39;&#39;    将最终爬去的内容写入文件中    :param context: 匹配好的内容    :param page: 当前爬去的页码数    &#39;&#39;&#39;    filename = "di" + str(page) + "yehtml.txt"    with open(fileName, "a") as file:      file.writelines(context + "\n")if __name__ == &#39;__main__&#39;:  n=neihanba()  n.spider()

二、爬取智联：

#encoding=utf-8import urllibimport urllib2 import re  class zhiLian():  def spider(self,position,workPlace):    &#39;&#39;&#39;    爬虫的主调度器    :param position: 职位    :param workPlace: 工作地点    &#39;&#39;&#39;    url="http://sou.zhaopin.com/jobs/searchresult.ashx?"    url+=urllib.urlencode({"jl":workPlace})    url+="&"    url+=urllib.urlencode({"kw":position})    isflow=True#是否进行下一页的爬去    page=1    while isflow:      url+="&"+str(page)      html=self.load(url)      self.deal1(html,page)      panduan = raw_input("是否继续爬虫下一页(y/n)!")      if panduan == "y":        isflow = True        page += 1      else:        isflow = False  def load(self,url):    &#39;&#39;&#39;    针对url地址进行全部爬去    :param url: url地址    :return: 返回爬去的内容    &#39;&#39;&#39;    header = {      "User-Agent": " Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36"    }    request = urllib2.Request(url, headers=header)    response = urllib2.urlopen(request)    html = response.read()    return html  def deal1(self,html,page):    &#39;&#39;&#39;     对之前爬去的内容进行正则匹配，匹配职位所对应的链接    :param html:之前爬去的内容    :param page: 正在爬去的页码    &#39;&#39;&#39;    parrten=re.compile(&#39;<a\s+style="font-weight:\s+bold"\s+par="ssidkey=y&ss=\d+&ff=\d+&sg=\w+&so=\d+"\s+href="(.*?)" rel="external nofollow" target="_blank">.*?</a>&#39;,re.S)    til=parrten.findall(html)#爬去链接    for t in til:      self.deal2(t,page)  def deal2(self,t,page):    &#39;&#39;&#39;    进行二次爬虫，然后在新的页面中对公司、薪资、工作经验进行匹配    :param t: url地址    :param page: 当前匹配的页数    &#39;&#39;&#39;    html=self.load(t)#返回二次爬虫的内容    parrten1=re.compile(&#39;<a\s+onclick=".*?"\s+href=".*?" rel="external nofollow" \s+target="_blank">(.*?)\s+.*?@@##@@</a>&#39;,re.S)    parrten2=re.compile(&#39;<li><span>职位月薪：</span><strong>(.*?) <a.*?>.*?</a></strong></li>&#39;,re.S)    parrent3=re.compile(&#39;<li><span>工作经验：</span><strong>(.*?)</strong></li>&#39;,re.S)    til1=parrten1.findall(html)    til2=parrten2.findall(html)    til3=parrent3.findall(html)    str=""    for t in til1:      t=t.ｒｅｐｌａｃｅ(&#39;@@##@@&#39;,"")      str+=t      str+="\t"    for t in til2:      str+=t      str += "\t"    for t in til3:      str+=t    self.writeData(str,page)  def writeData(self,context,page):    &#39;&#39;&#39;    将最终爬去的内容写入文件中    :param context: 匹配好的内容     :param page: 当前爬去的页码数    &#39;&#39;&#39;    fileName = "di" + str(page) + "yehtml.txt"    with open(fileName, "a") as file:      file.writelines(context + "\n")if __name__ == &#39;__main__&#39;:  position=raw_input("请输入职位：")  workPlace=raw_input("请输入工作地点：")  z=zhiLian()  z.spider(position,workPlace)

三、爬取贴吧：

#encoding=utf-8import urllibimport urllib2 import re  class teiba():  def spider(self,name,startPage,endPage):    url="http://tieba.baidu.com/f?ie=utf-8&"    url+=urllib.urlencode({"kw":name})    for page in range(startPage,endPage+1):      pn=50*(page-1)      urlFull=url+"&"+urllib.urlencode({"pn":pn})      html=self.loadPage(url)      self.dealPage(html,page)   def loadPage(self,url):    header={      "User-Agent":" Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36"    }    request=urllib2.Request(url,headers=header)    response=urllib2.urlopen(request)    html=response.read()    return html  def dealPage(self,html,page):    partten=re.compile(r&#39;<a\s+rel="noreferrer"\s+href="/p/\d+" rel="external nofollow" \s+title=".*?"\s+target="_blank" class="j_th_tit\s+">(.*?)</a>&#39;,re.S)    titleList=partten.findall(html)    rstr=r&#39;<span\s+class="topic-tag"\s+data-name=".*?">#(.*?)#</span>&#39;    for title in titleList:      title=re.sub(rstr,"",title)      self.writePage(title,page)  def writePage(self,context,page):    fileName="di"+str(page)+"yehtml.txt"    with open(fileName,"a") as file:      file.writelines(context+"\n")if __name__ == &#39;__main__&#39;:  name=raw_input("请输入贴吧名：")  startPage=raw_input("请输入起始页：")  endPage=raw_input("请输入终止页：")  t=teiba()  t.spider(name,int(startPage),int(endPage))

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