We start by creating a separate submodule to contain the functionality, one for vector, and one for raster. First, create the vector/manager.py file and start it up with the following imports:

import itertools, operator
from .data import *

Next, create the file raster/manager.py as follows:

import PIL, PIL.Image

To make these manager modules available to their respective vector and raster parent package, add the following import statement to both vector/__init__.py and raster/__init__.py:

import . import manager