// Tutorial //

How To Install Python 3 and Set Up a Programming Environment on Ubuntu 18.04 [Quickstart]

Published on July 12, 2018 · Updated on April 24, 2020
English
How To Install Python 3 and Set Up a Programming Environment on Ubuntu 18.04 [Quickstart]

###Introduction

Python is a flexible and versatile programming language, with strengths in scripting, automation, data analysis, machine learning, and back-end development.

This tutorial will walk you through installing Python and setting up a programming environment on an Ubuntu 18.04 server. For a more detailed version of this tutorial, with better explanations of each step, please refer to How To Install Python 3 and Set Up a Programming Environment on an Ubuntu 18.04 Server.

Step 1 — Update and Upgrade

Logged into your Ubuntu 18.04 server as a sudo non-root user, first update and upgrade your system to ensure that your shipped version of Python 3 is up-to-date.

  1. sudo apt update
  2. sudo apt -y upgrade

Confirm installation if prompted to do so.

Step 2 — Check Version of Python

Check which version of Python 3 is installed by typing:

  1. python3 -V

You’ll receive output similar to the following, depending on when you have updated your system.

Output
Python 3.6.7

Step 3 — Install pip

To manage software packages for Python, install pip, a tool that will install and manage libraries or modules to use in your projects.

  1. sudo apt install -y python3-pip

Python packages can be installed by typing:

  1. pip3 install package_name

Here, package_name can refer to any Python package or library, such as Django for web development or NumPy for scientific computing. So if you would like to install NumPy, you can do so with the command pip3 install numpy.

Step 4 — Install Additional Tools

There are a few more packages and development tools to install to ensure that we have a robust set-up for our programming environment:

  1. sudo apt install build-essential libssl-dev libffi-dev python3-dev

Step 5 — Install venv

Virtual environments enable you to have an isolated space on your server for Python projects. We’ll use venv, part of the standard Python 3 library, which we can install by typing:

  1. sudo apt install -y python3-venv

Step 6 — Create a Virtual Environment

You can create a new environment with the pyvenv command. Here, we’ll call our new environment my_env, but you can call yours whatever you want.

  1. python3.6 -m venv my_env

Step 7 — Activate Virtual Environment

Activate the environment using the command below, where my_env is the name of your programming environment.

  1. source my_env/bin/activate

Your command prompt will now be prefixed with the name of your environment:

Step 8 — Test Virtual Environment

Open the Python interpreter:

  1. python

Note that within the Python 3 virtual environment, you can use the command python instead of python3, and pip instead of pip3.

You’ll know you’re in the interpreter when you receive the following output:

Python 3.6.5 (default, Apr  1 2018, 05:46:30) 
[GCC 7.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

Now, use the print() function to create the traditional Hello, World program:

  1. print("Hello, World!")
Output
Hello, World!

Step 9 — Deactivate Virtual Environment

Quit the Python interpreter:

  1. quit()

Then exit the virtual environment:

  1. deactivate

Further Reading

Here are links to more detailed tutorials that are related to this guide:

Thanks for learning with the DigitalOcean Community. Check out our offerings for compute, storage, networking, and managed databases.

Learn more about us


Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in our Questions & Answers section, find tutorials and tools that will help you grow as a developer and scale your project or business, and subscribe to topics of interest.

Sign up now
About the authors

Still looking for an answer?

Ask a questionSearch for more help

Was this helpful?
 
3 Comments
Leave a comment...

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Beatifull explaniation… i apreciate it.

I tried running python3 -v to check version but it entered the python environment. python3 --version worked, though.

documentation is incomplete for 18.04 need to add below

sudo add-apt-repository universe