Create a Package. In the previous chapter's exercises (see the section called “Refactor a Script”) are some suggestions
for creating a simple module. The modules decribed in that
exercise are so small that adding modules does not seem necessary.
However, it's the best example of how packages arise when solving
Pick a module that you've already created. Add a second file
with a few simple classes that do little real work. These are best
described as "Hello World" classes, since they don't do anything
more useful than provide a simple response to indicate that the
module was imported correctly.
Create a packge directory with the necessary __init__.py
Create a demonstration script which imports and exercises both
modules from this package.