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associate custom code with custom data

Wait a minute...you’re using a dictionary to
keep your data all in one place, but now you’re
proposing to write a bunch of custom functions
that work on your data but aren’t associated with
it. Does that really make sense?

Keeping your code and its data together is good.
It does indeed make sense to try and associate the functions with the
data they are meant to work on, doesn’t it? After all, the functions
are only going to make sense when related to the data—that is, the
functions will be specific to the data, not general purpose. Because this
is the case, it’s a great idea to try and bundle the code with its data.
But how? Is there an easy way to associate custom code, in the form
of functions, with your custom data?

188 Chapter 6