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MRO and C3 linearisation

hard

One rule, applied repeatedly: take the head of the first list whose head appears in no other list's tail. See why the diamond resolves to D, B, C, A rather than depth-first, and why an inconsistent hierarchy raises TypeError at class-creation time.

Worst O(n²) in the number of classesSpace O(n)

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Read the questions this explains

Python-36-40

Python – MRO, object creation (__new__ / __init__), __slots__, dunder methods, str vs repr

Python-31-35

Python - dataclasses (advanced), attrs vs pydantic, abstract classes vs interfaces, polymorphism, mixins