text: from abc import abstractmethod
  
  class Bird:
  	def __init__(self, name, weight):
  		self.name = name
  		self.weight = weight
  
  	@abstractmethod
  	def fly(self):
  		pass
  
  
  class Hav(Bird):
  	def __init__(self, name, weight):
  		super().__init__(name, weight)
  
  
  	def fly(self):
  		print('I believe I can fly')
  
  
  hav = Hav('H', 2)
  hav.fly()
  