abstract classes in python example

Example 1: abstract method python

from abc import ABC, abstractmethod
 
class AbstractClassExample(ABC):
 
	def __init__(self, value):
        self.value = value
        super().__init__()
    
    @abstractmethod
    def do_something(self):
        pass

Example 2: abstarct class python

import abc
class Shape(metaclass=abc.ABCMeta):
   @abc.abstractmethod
   def area(self):
      pass
class Rectangle(Shape):
   def __init__(self, x,y):
      self.l = x
      self.b=y
   def area(self):
      return self.l*self.b
r = Rectangle(10,20)
print ('area: ',r.area())