Displaying photo information in an application

In this example, we shall create a utility class to handle photos that can be used by other applications (as a module) to access photo metadata and display preview images easily.

Getting ready

The following script makes use of Python Image Library (PIL); a compatible version for Python 3 is Pillow.

Pillow has not been included in the Raspbian repository (used by apt-get); therefore, we will need to install Pillow using a Python Package Manager called PIP.

To install packages for Python 3, we will use the Python 3 version of PIP (this requires 50 MB of available space).

The following commands can be used to install PIP:

sudo apt-get update
sudo apt-get install python3-pip

Before you use PIP, ensure that you have installed libjpeg-dev to allow Pillow to handle JPEG files. You can do this using the following command:

sudo apt-get install libjpeg-dev

Now you can install Pillow using the following PIP command:

sudo pip-3.2 install pillow

PIP also makes...