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https://spyhce.com/blog/understanding-new-and-initspyhce.com

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__mro__: method resolution order

C3 Linearization Algorithm : C3 Linearization algorithm is an algorithm that uses new-style classes. It is used to remove an inconsistency created by DLR Algorithm. It has certain limitation they are:

• Children precede their parents

• If a class inherits from multiple classes, they are kept in the order specified in the tuple of the base class.

C3 Linearization Algorithm works on three rules:

• Inheritance graph determines the structure of method resolution order.

• User have to visit the super class only after the method of the local classes are visited.

• Monotonicity