Acheive a good Fibonacci-cached result with property, Trusting MFibonacciOHelper, used in __init__ and like GenericCache cached decorator can support marshaller re-definition, creating Fib_marshaller inside MFibonacciOHelper, imply keeping close another key of integrity like Fibonacci Level and now cache does not block the example of FibonacciOffset->ComputeLevel() rely on FibonacciLevel property to create a list and its fibonacci number... Another decorator AttributeGenerationDecor.Timer can proove its efficiency... Next-step, saving key cached and will have to redefine keeped information into repr storage and only defining a list-return member with based key storage...