python beautifulsoup时报错，反复尝试，无解

wangouc

Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from bs4 import BeautifulSoup
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/bs4/__init__.py", line 30, in <module>
    from .builder import builder_registry, ParserRejectedMarkup
  File "/usr/lib/python3/dist-packages/bs4/builder/__init__.py", line 314, in <module>
    from . import _html5lib
  File "/usr/lib/python3/dist-packages/bs4/builder/_html5lib.py", line 70, in <module>
    class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):
AttributeError: module 'html5lib.treebuilders' has no attribute '_base'

错误代码原文。
网上找了很多解决办法，都不管用，求助论坛大神

wangouc

已经解决了，打扰了