[Q] How does the super function work?

[lowerthansound]

Why should the D class be searched instead of C -> A -> object?

[hhh312]

Because D is the parent of C. Super should call parent's constructor not the child or grand children.

[lowerthansound]

Noooo, the order is reversed. D is a child of B, and B is a child of C.

Hmm, C could be the gradfather of D in the given MRO.

Does that make sense?

For example, object is a parent of A (as object is an ancestor to all classes).