class Dog:
    scientific_name='Canis lupus familiaris'   

    def __ini__(self, name):
        self.name=name                         

    def print_name(self): 
        print(self.name)

rex = Dog('Rex')   
fido = Dog('Fido')                               

rex.name                   
fido.name

Dog.scientific_name        
                           
                           

rex.scientific_name        
fido.scientific_name

rex.print_name()