python virtualenv installation & usage guide
You will have to use a virtual environment to manage different versions of packages. You are working on two projects, Project A uses Python version 3.5 and Project B uses Python version 3.8, in this case, you will need two virtual environments one of python3.5 and one of python3.8.
virtualenv is a CLI tool to manage Python virtual environments that needs a Python interpreter to run. It works by making an exact copy of your Python interpreter binary (the python or python3) in a local directory where it is installed.
How do I install virtualenv
Make sure you have Python and pip installed, if not you can follow this guide about installing python and pip.
On Ubuntu run
sudo apt-get update && sudo apt-get install virtualenv && pip install virtualenv
On Mac OS run:
On Windows run:
pip install virtualenv
How do I create a virtual environment in Python
You can create a virtual environment with different versions of Python. You can follow this guide to install a specific version of python.
virtualenv create command
virtualenv -p <python_path> <name_of_environment>
python_path should be the path of your python executable and name_of_enviroment can be anything you like to name your environment.
To create, open your terminal and change the directory where you want to create a virtual environment.
For Python 3, run:
virtualenv -p python3 venv
For the specific versions of Python, run:
virtualenv -p <python3.x> venv
nitin@r777n:~/Workspace$ virtualenv -p python3 venv
created virtual environment CPython3.8.10.final.0-64 in 202ms
creator CPython3Posix(dest=/home/nitin/Workspace/venv, clear=False, global=False)
seeder FromAppData(download=False, pip=latest, setuptools=latest, wheel=latest, pkg_resources=latest, via=copy, app_data_dir=/home/nitin/.local/share/virtualenv/seed-app-data/v1.0.1.debian.1)
How to activate/enable Python virtualenv
Open your terminal and change the directory where you have created your virtual environment.
On Ubuntu and Mac Os run:
On Windows, run:
How to deactivate/disable Python virtualenv
To deactivate the Python virtual environment run:
How to delete a virtual environment in Python
To completely delete or remove the virtual environment:
Open your terminal and change the directory where you have created a virtual environment.
Assuming your virtual environment folder is named venv
rm -rf venv
I hope you learned about installing, creating, activating, deactivating, and deleting a virtual environment in this tutorial.
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