我已经从https://www.crummy.com/software/BeautifulSoup/bs4/download/4.5/下载了 beautifulsoup4-4.5.3.tar.gz并将其解压缩到我的 python 工作目录（这不是我的 python 安装目录） .
然而，当我跑
from bs4 import BeautifulSoup
在我的 IDLE 中，错误消息弹出：
>>> from bs4 import BeautifulSoup
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
from bs4 import BeautifulSoup
File "D:\python\beautifulsoup4-4.5.3\beautifulsoup4-4.5.3\bs4\__init__.py",
line 53
'You are trying to run the Python 2 version of Beautiful Soup under Python
3. This will not work.'<>'You need to convert the code, either by installing
it (`python setup.py install`) or by running 2to3 (`2to3 -w …