abstracts 0.0.2

Abstract class and interface definitions

Abstract class and interface definitions.

Create an abstract.Abstraction

An Abstraction is a metaclass for defining abstract classes.

Let’s define an abstract AFoo class and give it an abstract do_foo method.

Like any python class, an Abstraction can have any name, but it may be helpful to distinguish abstract classes from others by prefixing their name with A.

>>> import abc
>>> import abstracts

>>> class AFoo(metaclass=abstracts.Abstraction):
...
...     @abc.abstractmethod
...     def do_foo(self):
...         raise NotImplementedError

Abstract classes cannot be instantiated directly.

>>> AFoo()
Traceback (most recent call last):
...
TypeError: Can't instantiate abstract class AFoo with abstract method... do_foo