Abstract Base Class (ABC) And @abstractmthod

 # Main Syntax for importing:

# from abc import ABC, abstractmethod

# Full Code :

# from abc import ABCMeta, abstractmethod
from abc import ABC, abstractmethod

class Shape(ABC):
    @abstractmethod
    def printarea(self):
        return 0

class Rectangle(Shape):
    type = "Rectangle"
    sides = 4
    def __init__(self):
        self.length = 6
        self.breadth = 7

    def printarea(self):
        return self.length * self.breadth

rect1 = Rectangle()
print(rect1.printarea())

# Output:
# 42

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