#coding:utf-8"""@author 篮子里"""from baike_spider import html_downloader,html_outputer,html_parser,url_managerclass SpiderMain(object): def __init__(self): self.urls=url_manager.UrlManager() self.downloader=html_downloader.HtmlDownloader() self.parser=html_parser.HtmlParser() self.outputer=html_outputer.HtmOutputer() def craw(self,root_url): count=1 self.urls.add_new_url(root_url) while self.urls.has_new_url(): try: new_url=self.urls.get_new_url() print("craw {0}:{1}".format(count,new_url)) html_cont=self.downloader.download(new_url) new_url,new_data=self.parser.parse(new_url,html_cont) self.urls.add_new_url(new_url) self.outputer.collect_data(new_data) if count==1000: break count+=1 except(Exception): print("Failed!") self.outputer.output_html()if __name__=="__main__": root_url="http://baike.baidu.com/subview/16030/16030.htm" obj_spider=SpiderMain() obj_spider.craw(root_url)class UrlManager(object): def __init__(self): self.new_urls=set() self.old_urls=set() def add_new_url(self,url): if url is None: return if url not in self.new_urls and url not in self.old_urls: self.new_urls.add(url) def add_new_urls(self,urls): if urls is None or len(urls) ==0: return for url in urls: self.add_new_url(url) def has_new_url(self): return len(self.new_urls) !=0 def get_new_url(self): new_url=self.new_urls.pop() self.old_urls.add(new_url) return new_urlimport requestsclass HtmlDownloader(object): def download(self,url): if url is None: return None r=requests.get(url) if r.status_code !=200: return None return r.text.decode('UTF-8')from bs4 import BeautifulSoupimport reimport urlparse2class HtmlParser(object): def _get_new_urls(self,page_url,soup): new_urls=set() #http://www.huajiao.com/l/82485740?hd=1 links=soup.find_all("a",href=re.compile(r"/subview/\d+/\d+.htm")) for link in links: new_url=link["href"] new_full_url=urlparse2.urljoin(page_url,new_url) new_urls.add(new_full_url) return new_url def get_new_data(self,page_url,soup): res_data={} res_data["url"]=page_url #<dd class="lemmaWgt-lemmaTitle-title"><h1>科比·布莱恩特</h1> title_node=soup.find("dd",class_="lemmaWgt-lemmaTitle-title").find("h1") res_data["title"]=title_node.get_text() #<div class="lemma-summary" label-module="lemmaSummary"> summary_node=soup.find("div",class_="lemma-summary") res_data=summary_node.get_text() return res_data def parse(self,page_url,html_cont): if page_url is None or html_cont is None: return soup=BeautifulSoup(html_cont,"html.parser") new_urls = self._get_new_urls(page_url, soup) new_data = self._get_new_data(page_url, soup) return new_urls, new_dataclass HtmOutputer(object): def __init__(self): self.datas=[] def collect_data(self,data): if data is None: return self.datas.append(data) def output_html(self): fout = open("output.html","w",encoding="utf-8") fout.write("<html>") fout.write("<body>") fout.write("<table>") for data in self.datas: fout.write("<tr>") fout.write("<td>{0}</td>".format(data["url"])) fout.write("<td>{0}</td>".format(data["title"].encode("UTF-8"))) fout.write("<td>{0}</td>".format(data["summary"].encode("UTF-8"))) fout.write("</tr>") fout.write("</table>") fout.write("</body>") fout.write("</html>") fout.close()
1 回答
二毛毛
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报错：
UserWarning: You provided Unicode markup but also provided a value for from_encoding. Your from_encoding will be ignored.
解决方法：
soup = BeautifulSoup(html_doc,"html.parser")
这一句中删除【from_encoding="utf-8"】
原因：
python3 缺省的编码是unicode, 再在from_encoding设置为utf8, 会被忽视掉，去掉【from_encoding="utf-8"】这一个好了
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