13.15. Delegation
13.15.1. Wrapping
“Wrapping” is a term you will hear often in the Python programming world. It is a generic moniker to describe the packaging of an existing object, whether it be a data type or a piece of code, adding new, removing undesired, or otherwise modifying existing functionality to the existing object.
The subclassing or derivation of a standard type in Python is not allowed; however, you can wrap any type as the core member of a class so that the new object's behavior mimics all existing behavior of the data type that you want, does not do what you do not want it to do, and perhaps does something a little extra. This is called “wrapping a type.” In the Appendix, we will discuss how to extend Python, another form ...
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