导入BeautifulSoup报错AttributeError module object has no attribute _base

导入BeautifulSoup： from bs4 import BeautifulSoup

报错信息：

class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):
AttributeError: ‘module’ object has no attribute ‘_base’

解决方法：

在终端中安装指定版本的html5lib：pip install --upgrade html5lib==1.0b8

安装后报错信息解决。