Describe the Use of Metaclasses in Python

Metaclasses in Python define how classes behave. They are the ‘classes of classes’ and allow you to customize class creation and inheritance.

Example of a metaclass:

class Meta(type):
    def __new__(cls, name, bases, dct):
        dct['greeting'] = 'Hello'
        return super().__new__(cls, name, bases, dct)

class MyClass(metaclass=Meta):
    pass

print(MyClass.greeting)  # Hello