环境是windows8下的pycharm，爬的百度也有https

因为爬失败所以去掉了spider_main.py中的try,expect

发现返回报错：

craw 1 : https://baike.baidu.com/item/Python/407313?fr=aladdin

Traceback (most recent call last):

  File "S:/baike_spider/spider_main.py", line 43, in <module>

    obj_spider.craw(root_url)  # 启动爬虫

  File "S:/baike_spider/spider_main.py", line 27, in craw

    new_urls, new_data = self.parser.parse(new_url, html_cont)  # 新的列表

  File "S:\baike_spider\html_parser.py", line 39, in parse

    soup = BeautifulSoup(html_cont, 'html_parser', from_encoding='utf-8')

  File "E:\Tools\Python\Python3.5\lib\site-packages\bs4\__init__.py", line 165, in __init__

    % ",".join(features))

bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: html_parser. Do you need to install a parser library?

好像是解析器的问题，求解谢谢