Edube Interactive :: 2.6.1.6 Abstract classes vs. method overriding

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Now we'll try to inherit the abstract class and forget about overriding the abstract method by creating a RedField class that does not override the hello method.

import abc

class BluePrint(abc.ABC):
    @abc.abstractmethod
    def hello(self):
        pass

class GreenField(BluePrint):
    def hello(self):
        print('Welcome to Green Field!')

class RedField(BluePrint):
    def yellow(self):
        pass

gf = GreenField()
gf.hello()

rf = RedField()

The output:

Welcome to Green Field!
Traceback (most recent call last):
(...)
    rf = RedField()
TypeError: Can't instantiate abstract class RedField with abstract methods hello

output

indicates that:

it’s possible to instantiate the GreenField class and call the hello method;
the RedField class is still recognized as an abstract one, because it inherits all elements of its super class, which is abstract, and the RedField class does not override the abstract hello method.

Code