Introduction to Python Virtual environment virtualenv

Reference website: https://realpython.com/python-virtual-environments-a-primer/

First, create a new virtual environment

2:virtualenv my_new_virtualenv3. Python3 already have the Venv module from the standard library installedpython3-m venv my_new_virtualenv
Or
Virtualenv-p $ (which Python3) my_new_virtualenv

Start the virtual environment

CD .../python-virtual-environmentssource my_new_virtualenv/bin/activate

Turn off the virtual environment

Deactivate

Second, the virtual environment working principle

This section may refer to the following sections of the above Web site,

How Does a Virtual environment work?

The most important of these is that, in both environments, the Python executables store location $which python and environment variable $path $echo $PATH Different.

Iii. Virtualenvwrapper-Tools for managing multiple virtual environments

When we create multiple virtual environments, there are a lot of problems around how to manage these virtual environments, so Python provides a toolkit virtualenvwrapper for managing multiple virtual environments. A few useful features of the toolkit are listed below, please refer to the above website for details.

• Organizes all of your virtual environments on one location
• Provides methods to help you easily create, delete, and copy environments
• Provides a single command to switch between environments

Introduction to Python Virtual environment virtualenv