Python Virtual Environment

Why create python virtual environment?

Suppose you want to develop more than one python project in your system. Suppose project-1 depending on python3.9 and project-2 depending on python3.10 version. In this situation we need to create virtual environment.

If you create virtual environment then you can easily manage dependencies in your python projects.

How to create python virtual environment in Ubuntu operating system?

Suppose in your Ubuntu operating system python3.10 version already installed but you want to use python3.12 version for your project. First install the python3.12 version in Ubuntu.

Second, create the directory for your project and go to the directory by Ubuntu terminal

Run the command to create virtual environment
$ python3.12 -m venv virtual-directory-name

Active the python virtual environment

Activate the python virtual environment in the Ubuntu.

Command:
$ source env/bin/activate

Check python version after virtual environment is activated

Command:
(virtual-directory) comsysapp:~$ python --version
Or
(virtual-directory) comsysapp:~$ python3 --version
Or
(virtual-directory) comsysapp:~$ python3.12 --version

Python version will be python3.12

How to deactivate the python virtual environment