Installing Python packages
Some Python packages can be found in the Raspbian archives and can be installed using apt. For example:
sudo apt-get update sudo apt-get install python3-picamera
This is the preferred method of installing software, as it means that the modules you install can be kept up to date easily with the usual
sudo apt-get update and
sudo apt-get upgrade commands.
Python packages in Raspbian which are compatible with Python 2.x will always have a
python- prefix. So, the
picamera package for Python 2.x is named
python-picamera (as shown in the example above). Python 3 packages always have a
python3- prefix. So, to install
picamera for Python 3 you would use:
sudo apt-get install python3-picamera
Uninstalling packages installed via APT can be accomplished as follows:
sudo apt-get remove python3-picamera
They can be completely removed with
sudo apt-get purge python3-picamera
Not all Python packages are available in the Raspbian archives, and those that are can sometimes be out-of-date. If you can't find a suitable version in the Raspbian archives, you can install packages from the Python Package Index (PyPI). To do so, use the
pip is installed by default in Raspbian Desktop images (but not Raspbian Lite). You can install it with
sudo apt-get install python3-pip
To get the Python 2 version:
sudo apt-get install python-pip
pip3 installs modules for Python 3, and
pip installs modules for Python 2.
For example, the following command installs the Unicorn HAT library for Python 3:
sudo pip3 install unicornhat
The following command installs the Unicorn HAT library for Python 2:
sudo pip install unicornhat
Uninstall Python modules with
sudo pip3 uninstall or
sudo pip uninstall.
Upload your own Python modules to
pip with the guide at PyPI.
The official Python Package Index (PyPI) hosts files uploaded by package maintainers. Some packages require compilation (compiling C/C++ or similar code) in order to install them, which can be a time-consuming task, particlarly on the single-core Raspberry Pi 1 or Pi Zero.
piwheels is a service providing pre-compiled packages (called Python wheels) ready for use on the Raspberry Pi. Raspbian is pre-configired to use piwheels for pip. Read more about the piwheels project at www.piwheels.org.