python original class

What is the use of metaclass?

Good question, metaclass will be called when creating a new class that uses it, here are some views on the benefits of doing so:

◆ Decorate class All methods for logging or profiling.

◆ New method for automatic Mix-in

◆ Register classes on creation. (For example, automatically register plug-ins or create database schemas from class members.)

◆ Provide interface registration, automatic function discovery and interface adaptation.

◆ Class verification: Prevent subclassing and verify whether all methods have docstrings.