The project you're snapping doesn't contain a
setup.py or any sort of build system, so Snapcraft doesn't know what you want installed. You can either use setuptools and add a
setup.py to your project, or keep it the way it is and tell Snapcraft exactly what you want to install, like so (note the use of the the
summary: Photo and video sorting tool
Media sorting and backup tool to organize photos and videos from your camera in folders by year, month and day.
The software will collect all files from the input directory and transfer them to the output directory without
changing the files content. It will only rename the files and place them in the proper directory for the year, month and day.
mkdir -p $SNAPCRAFT_PART_INSTALL/bin
cp phockup.py $SNAPCRAFT_PART_INSTALL/bin/phockup