If you have installed pip3, then execute the command to install virtualenv environment
pip3 install virtualenv
Installation detects whether the installation was successful version
virtualenv --version
Create a new directory
Mac:~ michael$ mkdir myproject Mac:~ michael$ cd myproject/ Mac:myproject michael$
Creating a stand-alone Python runtime environment, namedvenv，参数--no-site-packages，表示已经安装到系统Python环境中的所有第三方包都不会复制过来，这样，我们就得到了一个不带任何第三方包的“干净”的Python运行环境。
Mac:myproject michael$ virtualenv --no-site-packages venv Using base prefix '/usr/local/.../Python.framework/Versions/3.4' New python executable in venv/bin/python3.4 Also creating executable in venv/bin/python Installing setuptools, pip, wheel...done.
With sourceaccess to the environment
Mac:myproject michael$ source venv/bin/activate
(venv)Mac:myproject michael$
Exit the current venvenvironment
(venv)Mac:myproject michael$ deactivate
Mac:myproject michael$
reference:
https://www.jianshu.com/p/d37662e6ef34
https://www.liaoxuefeng.com/wiki/1016959663602400/1019273143120480