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How to create a Python virtual environment in Ubuntu?

Run the following commands:

> sudo apt update
> sudo apt install python3
> python3 -V
> sudo apt install python3-pip
> pip3 -V
> pip3 install virtualenv
> virtualenv env
> source env/bin/activate
(env) > python -V
Python 3.10.1
(env) > pip -V
pip 21.3.1 from /home/user/env/lib/python3.10/site-packages/pip (python 3.10)
(env) > deactivate

Other way of creating virtual environment:

> python3.10 -V
Python 3.10.1
> python3.10 -m venv venv1
> source venv1/bin/activate
(venv1) > python -V
Python 3.10.1
(venv1) >pip -V
pip 21.2.4 from /home/user/venv-1/lib/python3.10/site-packages/pip (python 3.10)
(venv1) > deactivate
>

> python -V
Python 3.8.10
> python -m venv venv2
> source venv2/bin/activate
(venv2) > python -V
Python 3.8.10
(venv2) > pip -V
pip 20.0.2 from /home/user/venv-2/lib/python3.8/site-packages/pip (python 3.8)
(venv2) > deactivate
>

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