Everybody knows that dolphins are mammals. Below is a class Mammal with 2 methods: __init__ and greet. __init__ defines the attribute bio_class with the value mammal, while greet prints out I am a mammal!.
Create a class Dolphin. It should be a child class of the class Mammal and have the same __init__. However, you need to override the greet method so that in addition to the I am a mammal! it prints I am a dolphin!. Use the super() function. You don't need to define any additional attributes in the class Dolphin.
Here's an example of this:
dolph = Dolphin()
dolph.greet()
# I am a mammal!
# I am a dolphin!
Pay attention to the order of actions in the method. Look closely at the expected output and think about what should go first: the calling of the superclass method or printing the new message?