Creating a Python Virtual Environment on CentOS 8
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What is a Python Virtual Environment?
A Python virtual environment is an isolated project space on your system that contains its own Python executable, packages, and modules. Your Python applications and projects often have their own specific dependencies. With a virtual environment you can manage each of your project’s distinct dependencies without having them interfere with each other. You can use the virtualenv tool to create a virtual environment on your system. This guide will show you how to use virtualenv to create and run a Python virtual environment on a CentOS 8 Linode.
Before You Begin
Update your system:
sudo yum update
NoteThis guide is written for a non-root user. Commands that require elevated privileges are prefixed with
sudo. If you’re not familiar with the
sudocommand, you can check our Users and Groups guide.
Create a Python Virtual Environment
NoteCentOS 8 does not include any version of Python by default. To install Python on CentOS 8, read our guide on installing Python 3 on CentOS 8
To install Python’s virtual environment:
sudo yum install virtualenv
python-environmentsdirectory in your user’s home directory and navigate to it:
mkdir ~/python-environments && cd ~/python-environments
Create a Python virtual environment. By default, virtualenv attempts to use your system’s default Python interpreter to create a new environment. Replace
envwith the name you would like to assign to your virtual environment.
If your CentOS 8 system has another version of Python installed and you’d like to use it to create your virtual environment, use the e
--pythonoption to designate it. For example:
virtualenv --python=python2.7 env
Validate that your environment is installed with the version of Python that you expect:
You should see your
envenvironments Python version:
Activate Your Virtual Environment
Activate the newly created virtual environment:
The name of the working environment appears in parentheses after it’s created.
You can now begin installing Python packages and libraries that will remain isolated to your virtual environment.
Deactivate a Virtual Environment
To deactivate an active virtual environment, issue the following command:
Your virtual environment is deactivated and you should no longer see its name listed next to your command line’s prompt
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