human
Solve the following python programming problem given the following code:
# Both implement the "Animal" Protocol, which consists of the one make_sound function
class Dog():
    
    def make_sound(self):
        return "Bark"
    
class Cat():
    
    def make_sound(self):
        return "Meow"  
    
a1 = Dog()
a2 = Cat()
animals = [a1, a2]
for a in animals:
    print(isinstance(a, Animal), "     ", a.make_sound())
Given the above code, generate some markdown instructions for it.
assistant
#Here is the Python program you requested.

Interfaces

The above examples show inheritance and polymorphism.
Notice that we didn't actually need to set up the inheritance.
We could have just defined 2 different classes and have them both make_sound.
In Java and C++ this is done more formally through Interfaces and  Abstract Base Classes, respectively, plus inheritance.
In Python, this agreement to define make_sound is called duck typing.
"If it walks like a duck and quacks like a duck, it is a duck."