python pip 安装到了哪儿？？

Python3.x版本及以上

在实际使用Python做开发的时候，用pip安装管理依赖库是非常必要的。

pip install mysql 或者 sudo pip install mysql （或者用pip3安装）

其中mysql是安装的依赖库名或者包名。
或者离线安装

wget http://...selenium-3.141.0.tar.gz
tar zvxf selenium-3.141.0.tar.gz
cd selenium-3.141.0
python setup.py build
python setup.py install
//如果python装了多版本，需要指定安装。pyhon3 setup.py build

装了那么多第三方库到自己电脑，到底安装到了哪儿？？

第一步：先查看自己的默认安装路径到底是在哪？列出全局的packages包的安装路径在哪？

打开cmd命令窗口，执行命令：python -m site

输出：

sys.path = [
    '/usr/local/lib',
    '/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python37.zip',
    '/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7',
    '/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload',
    '/Users/username/Library/Python/3.7/lib/python/site-packages',
    '/usr/local/lib/python3.7/site-packages',
    '/usr/local/lib/python3.7/site-packages/selenium-3.141.0-py3.7.egg',
    '/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages',
    '/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium-3.141.0-py3.7.egg',
]
USER_BASE: '/Users/username/Library/Python/3.7' (exists)
USER_SITE: '/Users/username/Library/Python/3.7/lib/python/site-packages' (exists)
ENABLE_USER_SITE: True

site-packages 即为库安装的位置