python3 安装 Beautifulsoup4 版本不兼容问题

注意我的python的windows安装目录为：D:\Python37-32

python进行爬虫时引用到BeautifuSoup开源的xml解析工具。以下为beautifulsoup4的windows的安装步骤：

        首先去网站下载beautifulsoup压缩包（beautifulsoup4-4.6.0.tar.gz）

                          https://www.crummy.com/software/BeautifulSoup/#Download

        将下载下来的压缩包解压后放入到python的安装目录(D:\Python37-32\beautifulsoup4-4.6.0)

        进入cmd，执行命令：

         

cd D:\Python37-32\beautifulsoup4-4.6.0setup.py buildsetup.py install

       输入验证是否安装成功：

               在命令行输入：python

               然后输入：from bs4 import BeautifulSoup

      如果不出现任何提示信息表示安装成功。如果如下所示则安装失败，版本不兼容

      在python3中引用BeautifuSoup4时会出现版本不兼容的情况,具体看下面的错误代码

>>> from bs4 import BeautiulSoupTraceback (most recent call last):  File "<stdin>", line 1, in <module>  File "D:\Python37-32\beautifulsoup4-4.6.0\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 bs4`).'                                                                                                       ^SyntaxError: invalid syntax

       将beautifulSoup解压目录中的bs4文件夹（D:\Python37-32\beautifulsoup4-4.6.0\bs4）和 2to3.py（D:\Python37-32\Tools\scripts\）复制到python的安装目录下的Lib(D:\Python37-32\Lib)文件夹下

        进入D:\Python37-32\Lib 目录,并执行 2to3.py bs4 -w 命令

      

cd D:\Python37-32\Lib2to3.py bs4 -w

       最后再输入python

      然后输入 from bs4 import BeautifulSoup