hbutils.design.final

Overview:

Final class implement (not a custom design pattern, but useful for designing).

FinalMeta

class hbutils.design.final.FinalMeta(name, bases, attrs)

Overview:

A meta class for making one class be final (unable to be extended by other classes).

__init__(*args, **kwargs)

Initialize self. See help(type(self)) for accurate signature.

static __new__(mcs, name, bases, attrs)

Overview:

Creation process of new finalized class.

Arguments:

• name (str): Name of the new created class

• bases (Tuple[type]): Base classes of the new created class

• attrs (:obj: Dict[str, Any]): Attached attributes (such as method and fields) of the new created class

Example:

>>> class FinalClass(metaclass=FinalMeta):  # this is a final class
>>>     pass
>>>
>>> class TryToExtendFinalClass(FinalMeta):  # TypeError will be raised in compile time
>>>     pass
>>>