python3 mac 虚拟环境

先看看环境

~ % python3 --version
Python 3.8.9

which python3
/usr/bin/python3

一行命令搞定：

~ % python3 -m venv py3-env
debby@my-MB0 ~ % source py3-env/bin/activate   #进入虚拟环境
(py3-env) debby@my-MB0 ~ % pip list     
Package    Version 
---------- -------
pip        20.2.3
setuptools 49.2.1

 # 进入
source py3-env/bin/activate

 # 退出
deactivate

reference：python - How to correctly install python3 and virtualenv on MacOS Mojave? - Stack Overflow