如果没有设置PYTHONUSERBASE，默认会安装在~/.local下
如果不希望安装在.local目录下，可以通过配置环境变量PYTHONUSERBASE指定对应的路径，比如/usr/local
当然也可以直接修改site.py的_getuserbase方法，通过设置USER_SITE和USER_BASE来指定
即调整USER SITE有2种方式：
1. 设置环境变量PYTHONUSERBASE
2. 设置site.py的对象变量USER_SITE和USER_BASE
$ export PYTHONUSERBASE=/usr/local $ source .bashrc $ python3 -m site -help /usr/lib/python3.8/site.py [--user-base] [--user-site] Without arguments print some useful information With arguments print the value of USER_BASE and/or USER_SITE separated by ':'. Exit codes with --user-base or --user-site: 0 - user site directory is enabled 1 - user site directory is disabled by user 2 - uses site directory is disabled by super user or for security reasons >2 - unknown error $ python3 -m site sys.path = [ '/home/V01/uidq2578', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/usr/local/lib/python3.8/dist-packages', '/usr/lib/python3/dist-packages', ] USER_BASE: '/usr/local' (exists) USER_SITE: '/usr/local/lib/python3.8/site-packages' (doesn't exist) ENABLE_USER_SITE: True