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Installing python packages on linux

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  1. Installing Packages¶
  2. Requirements for Installing Packages¶
  3. Ensure you can run Python from the command line¶
  4. Ensure you can run pip from the command line¶
  5. Ensure pip, setuptools, and wheel are up to date¶
  6. Optionally, create a virtual environment¶
  7. Creating Virtual Environments¶
  8. Installing pip/setuptools/wheel with Linux Package Managers¶
  9. Fedora¶
  10. CentOS/RHEL¶
  11. openSUSE¶
  12. Debian/Ubuntu and derivatives¶
  13. Arch Linux¶
  14. Table of Contents
  15. Previous topic
  16. Next topic
  17. Navigation

Installing Packages¶

This section covers the basics of how to install Python packages .

It’s important to note that the term “package” in this context is being used to describe a bundle of software to be installed (i.e. as a synonym for a distribution ). It does not to refer to the kind of package that you import in your Python source code (i.e. a container of modules). It is common in the Python community to refer to a distribution using the term “package”. Using the term “distribution” is often not preferred, because it can easily be confused with a Linux distribution, or another larger software distribution like Python itself.

Requirements for Installing Packages¶

This section describes the steps to follow before installing other Python packages.

Ensure you can run Python from the command line¶

Before you go any further, make sure you have Python and that the expected version is available from your command line. You can check this by running:

You should get some output like Python 3.6.3 . If you do not have Python, please install the latest 3.x version from python.org or refer to the Installing Python section of the Hitchhiker’s Guide to Python.

If you’re a newcomer and you get an error like this:

>>> python3 --version Traceback (most recent call last): File "", line 1, in NameError: name 'python3' is not defined

It’s because this command and other suggested commands in this tutorial are intended to be run in a shell (also called a terminal or console). See the Python for Beginners getting started tutorial for an introduction to using your operating system’s shell and interacting with Python.

If you’re using an enhanced shell like IPython or the Jupyter notebook, you can run system commands like those in this tutorial by prefacing them with a ! character:

In [1]: import sys ! --version Python 3.6.3

It’s recommended to write rather than plain python in order to ensure that commands are run in the Python installation matching the currently running notebook (which may not be the same Python installation that the python command refers to).

Due to the way most Linux distributions are handling the Python 3 migration, Linux users using the system Python without creating a virtual environment first should replace the python command in this tutorial with python3 and the python -m pip command with python3 -m pip —user . Do not run any of the commands in this tutorial with sudo : if you get a permissions error, come back to the section on creating virtual environments, set one up, and then continue with the tutorial as written.

Ensure you can run pip from the command line¶

Additionally, you’ll need to make sure you have pip available. You can check this by running:

If you installed Python from source, with an installer from python.org, or via Homebrew you should already have pip. If you’re on Linux and installed using your OS package manager, you may have to install pip separately, see Installing pip/setuptools/wheel with Linux Package Managers .

If pip isn’t already installed, then first try to bootstrap it from the standard library:

python3 -m ensurepip --default-pip
py -m ensurepip --default-pip

If that still doesn’t allow you to run python -m pip :

  • Securely Download get-pip.py1
  • Run python get-pip.py . 2 This will install or upgrade pip. Additionally, it will install setuptools and wheel if they’re not installed already.

Warning Be cautious if you’re using a Python install that’s managed by your operating system or another package manager. get-pip.py does not coordinate with those tools, and may leave your system in an inconsistent state. You can use python get-pip.py —prefix=/usr/local/ to install in /usr/local which is designed for locally-installed software.

Ensure pip, setuptools, and wheel are up to date¶

While pip alone is sufficient to install from pre-built binary archives, up to date copies of the setuptools and wheel projects are useful to ensure you can also install from source archives:

python3 -m pip install --upgrade pip setuptools wheel
py -m pip install --upgrade pip setuptools wheel

Optionally, create a virtual environment¶

See section below for details, but here’s the basic venv 3 command to use on a typical Linux system:

python3 -m venv tutorial_env source tutorial_env/bin/activate
py -m venv tutorial_env tutorial_env\Scripts\activate

This will create a new virtual environment in the tutorial_env subdirectory, and configure the current shell to use it as the default python environment.

Creating Virtual Environments¶

Python “Virtual Environments” allow Python packages to be installed in an isolated location for a particular application, rather than being installed globally. If you are looking to safely install global command line tools, see Installing stand alone command line tools .

Imagine you have an application that needs version 1 of LibFoo, but another application requires version 2. How can you use both these applications? If you install everything into /usr/lib/python3.6/site-packages (or whatever your platform’s standard location is), it’s easy to end up in a situation where you unintentionally upgrade an application that shouldn’t be upgraded.

Or more generally, what if you want to install an application and leave it be? If an application works, any change in its libraries or the versions of those libraries can break the application.

Also, what if you can’t install packages into the global site-packages directory? For instance, on a shared host.

In all these cases, virtual environments can help you. They have their own installation directories and they don’t share libraries with other virtual environments.

Currently, there are two common tools for creating Python virtual environments:

  • venv is available by default in Python 3.3 and later, and installs pip and setuptools into created virtual environments in Python 3.4 and later.
  • virtualenv needs to be installed separately, but supports Python 2.7+ and Python 3.3+, and pip , setuptools and wheel are always installed into created virtual environments by default (regardless of Python version).

The basic usage is like so:

python3 -m venv source /bin/activate

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Installing pip/setuptools/wheel with Linux Package Managers¶

This section covers how to install pip , setuptools , and wheel using Linux package managers.

If you’re using a Python that was downloaded from python.org, then this section does not apply. See the Requirements for Installing Packages section instead.

Note that it’s common for the versions of pip , setuptools , and wheel supported by a specific Linux Distribution to be outdated by the time it’s released to the public, and updates generally only occur for security reasons, not for feature updates. For certain Distributions, there are additional repositories that can be enabled to provide newer versions. The repositories we know about are explained below.

Also note that it’s somewhat common for Distributions to apply patches for the sake of security and normalization to their own standards. In some cases, this can lead to bugs or unexpected behaviors that vary from the original unpatched versions. When this is known, we will make note of it below.

Fedora¶

sudo dnf install python3-pip python3-wheel

To learn more about Python in Fedora, please visit the official Fedora docs, Python Classroom or Fedora Loves Python.

CentOS/RHEL¶

CentOS and RHEL don’t offer pip or wheel in their core repositories, although setuptools is installed by default.

To install pip and wheel for the system Python, there are two options:

    Enable the EPEL repository using these instructions. On EPEL 7, you can install pip and wheel like so:

sudo dnf install python3-pip python3-wheel
sudo dnf install python3-pip python3-wheel
sudo dnf upgrade python3-setuptools

To install pip, wheel, and setuptools, in a parallel, non-system environment (using yum) then there are two options:

  1. Use the “Software Collections” feature to enable a parallel collection that includes pip, setuptools, and wheel.
    • For Redhat, see here: https://developers.redhat.com/products/softwarecollections/overview
    • For CentOS, see here: https://github.com/sclorg

Be aware that collections may not contain the most recent versions.

sudo yum install python34u python34u-wheel

openSUSE¶

sudo zypper install python3-pip python3-setuptools python3-wheel

Debian/Ubuntu and derivatives¶

Firstly, update and refresh repository lists by running this command:

sudo apt update sudo apt install python3-venv python3-pip

Recent Debian/Ubuntu versions have modified pip to use the “User Scheme” by default, which is a significant behavior change that can be surprising to some users.

Arch Linux¶

Currently, there is no “copr” yum plugin available for CentOS/RHEL, so the only option is to manually place the repo files as described.

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