#coding:utf8

from?bs4?import?BeautifulSoup
import?urlparse
import?re

class?HtmlParser(object):

????def?parse(self,?page_url,?html_cont):
????????if?page_url?is?None?or?html_cont?is?None:
????????????return

????????soup?=?BeautifulSoup(html_cont,?'html.parser',?from_encoding='utf-8')
????????new_urls?=?self._get_new_urls(page_url,?soup)
????????new_data?=?self._get_new_data(page_url,?soup)
????????return?new_urls,?new_data

????def?_get_new_urls(self,?page_url,?soup):
????????new_urls?=?set()
????????links?=?soup.find_all('a',?href=re.compile(r"/item/(.*)"))
????????for?link?in?links:
????????????new_url?=?link['href']
????????????new_full_url?=?urlparse.urljoin(page_url,new_url)
????????????new_urls.add(new_full_url)
????????return?new_urls

????def?_get_new_data(self,?page_url,?soup):
????????res_data?=?{}

????????res_data['url']?=?page_url

????????title_node?=?soup.find('dd',class_=?"lemmaWgt-lemmaTitle-title").find("h1")
????????res_data['title']?=?title_node.get_text()

????????summary_node?=?soup.find('div',?class_?=?"lemma-summary")
????????res_data['summary']?=?summary_node.get_text()

????????return?res_data

在html_parser里面加了：from bs4 import BeautifulSoup 但是還是報錯。神奇的是前面的測試BeautifulSoup的程序跑起來沒有問題。有大蝦幫忙看下怎么回事么

錯誤如下：

NameErrorTraceback?(most?recent?call?last)
/Users/yang/PythonSource/pachong/spider_main.py?in?<module>()
?????34?????root_url?=?"https://baike.baidu.com/item/Python/407313?fr=aladdin"
?????35?????obj_spider?=?SpiderMain()
--->?36?????obj_spider.craw(root_url)
?????37?
/Users/yang/PythonSource/pachong/spider_main.py?in?craw(self,?root_url)
?????21?????????????html_cont?=?self.downloader.download(new_url)
?????22?????????????print?new_url
--->?23?????????????new_urls,?new_data?=?self.parser.parse(new_url,?html_cont)
?????24?????????????self.urls.add_new_urls(new_urls)
?????25?????????????self.outputer.collect_data(new_data)
/Users/yang/PythonSource/pachong/html_parser.py?in?parse(self,?page_url,?html_cont)
?????31?????????title_node?=?soup.find('dd',class_=?"lemmaWgt-lemmaTitle-title").find("h1")
?????32?????????res_data['title']?=?title_node.get_text()
--->?33?
?????34?????????summary_node?=?soup.find('div',?class_?=?"lemma-summary")
?????35?????????res_data['summary']?=?summary_node.get_text()
NameError:?global?name?'BeautifulSoup'?is?not?defined