When moving to Python, the real big problem that arises is the transformation of a Python array into the C++ container the team used for years.
Let’s set some hypothesis :
- there is a separation between the class containing the data and the class that uses the data (iterators, …)
- the containing class can be changed (policy or strategy pattern)
The first hypothesis is derived from the responsibility principle, the two classes have two distinct responsibilities, the first allocates the data space and allows simple access to it, the second allows usual operations (assignation, comparison tests or iterations for instance).
The second one will be the heart of the wrapper. It allows to change the way data is stored and accessed in a simple way.