如何解决'module'对象没有属性'_base'问题？

我正在尝试运行位于此处的investopedia api:https://github.com/kirkthaker/investopedia-trading-api

我写了以下脚本:

from investopedia import *
client = Account("emailaddress","password")

status = client.get_portfolio_status()
print status.account_val
print status.buying_power
print status.cash
print status.annual_return

我能够通过运行py -2.7 setup.py install每个依赖项来安装所有模块.

我收到以下错误:

Traceback (most recent call last):
File "C:/Users/Z/PycharmProjects/investopedia/test.py", line 1, in 
    from investopedia import *
  File "C:\Users\Z\PycharmProjects\investopedia\investopedia.py", line 4, in 
    from bs4 import BeautifulSoup
  File "C:\Users\Z\AppData\Local\Enthought\Canopy\User\lib\site-packages\bs4\__init__.py", line 29, in 
    from .builder import builder_registry
  File "C:\Users\Z\AppData\Local\Enthought\Canopy\User\lib\site-packages\bs4\builder\__init__.py", line 297, in 
    from . import _html5lib
  File "C:\Users\Z\AppData\Local\Enthought\Canopy\User\lib\site-packages\bs4\builder\_html5lib.py", line 57, in 
    class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):
AttributeError: 'module' object has no attribute '_base'

pip2.7 install --upgrade beautifulsoup4
pip2.7 install --upgrade html5lib