It is recommended to use python3-venv
Reason: The official announcement stated that pyvenv has been deprecated since version 3.6
Original text: pyvenv is the recommended tool for creating virtual environments for Python 3.3 and 3.4, and is deprecated in Python 3.6.
Create a virtual environment under Linux (taking Ubuntu as an example)
First install dependency packages
sudo apt-get install python3-pip python3-venv
Create a virtual environment based on python3 named test
python3 -m venv test
Activate test environment
. ./test/bin/activate