Python folder structure for project directory and easy import

My team has a folder of several small projects in python3. Amongst them, we have a utility folder with several utility functions, that are used throughout the projects. But the way to import it is very uncomfortable. This is the structure we use:

temp_projects
    util
        storage.py
        geometry.py
    project1
        project1.py
    project2
        project2.py

The problem is that the import in the projects looks terrible:

sys.path.insert(1, os.path.join(sys.path[0], '..'))
import util.geometry

util.geometry.rotate_coordinates(....)

Also, pycharm and other tools are having trouble understanding it and to supply completion.

Is there some neater way to do that?

from Python folder structure for project directory and easy import