在Mac OS下设置Python Symlink，实现轻松管理和运行不同版本的Python程序

Python 笔记

一、Mac OS下Python Symlink设置的基本概念

二、设置Python Symlink步骤详解

$ ls -l /System/Library/Frameworks/Python.framework/Versions/

lrwxr-xr-x    1 root  wheel    3B  6  5  2019 Current -> 2.7
lrwxr-xr-x    1 root  wheel    3B  6  5  2019 A -> 2.7
lrwxr-xr-x    1 root  wheel    3B  6  5  2019 Current -> 2.7
lrwxr-xr-x    1 root  wheel    3B  6  5  2019 A -> 2.7

$ ln -s /System/Library/Frameworks/Python.framework/Versions/3.8/bin/python3 /usr/local/bin/python

$ python --version

Python 3.8.1

三、使用Python Symlink运行与管理Python程序

$ ln -sf /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 /usr/local/bin/python

$ python -m pip install numpy

$ python -m pip install virtualenv

$ python -m venv venv
$ ln -sf /Users/yourname/path/to/project/venv/bin/python /usr/local/bin/python

四、总结