The difference between Python's new class and the old class

The new class was introduced in 2.2 in order to unify the * * *.

Code explanation

The above example illustrates the problem more clearly.

B is a new class of definitions. So when you enter B, either type (b) or b.__class__ is the output <class ' __main__. B ' >.

A is a defined legacy class.

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Another difference between a new class and a legacy class is that when multiple inheritance is found, find the method to invoke.

The new class is a breadth-first lookup algorithm.

The lookup method for legacy classes is depth-first.

The difference between Python's new class and the old class