When you plan to implement a multiple inheritance from abstract classes, remember that an effective subclass should override all abstract methods inherited from its super classes.

• Abstract Base Class (ABC) is a class that cannot be instantiated. Such a class is a base class for concrete classes;
• ABC can only be inherited from;
• we are forced to override all abstract methods by delivering concrete method implementations.

A note:

It’s tempting to call a module “abc” and then try to import it, but by doing so Python imports the module containing the ABC class instead of your local file. This could cause some confusion – why does such a common name as “abc” conflict with my simple module “abc”?

Run your own experiment to become familiar with the error messages you would encounter in such a situation.