What are some examples of metaclasses in Python's standard library?

What are some examples of metaclasses in Python's standard library?

Metaclasses in Python are classes of classes that define how classes behave. A common example is type, which is the default metaclass for all classes.

Can you give me a specific example of how type is used?

Sure! When you create a class, Python uses type to create it. For instance, MyClass = type('MyClass', (BaseClass,), {}) creates a new class named MyClass.

Are there any other metaclasses in the standard library?

Yes, another example is abc.ABCMeta, which is used to define abstract base classes. It helps in creating interfaces.

How do I create my own metaclass?

To create your own metaclass, you can subclass type and override methods like __new__ or __init__ to customize class creation.