安装软件包后，我进入了python环境。我是python的新手，所以我导入了我需要的模块，但这个模块无法导入。有人可以帮我解决吗。
>>> import readability
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/readability/__init__.py", line 1, in <module>
from .readability import Document
File "/usr/local/lib/python2.7/dist-packages/readability/readability.py", line 2, in <module>
from cleaners import html_cleaner, clean_attributes
File "/usr/local/lib/python2.7/dist-packages/readability/cleaners.py", line 3, in <module>
from lxml.html.clean import Cleaner
ImportError: No module named lxml.html.clean
我真的需要这个模块才能工作。我的印象是这是使用的模块
http://www.readability.com/
并在苹果野生动物园read协议。