human
Can you provide a the Python code you requested given the following:
I am working on the file "PythonBootCamp/Complete-Python-Bootcamp-master/Object Oriented Programming.ipynb".
The first task is:
In this example, we have two classes: Animal and Dog. The Animal is the base class, the Dog is the derived class. 
The derived class inherits the functionality of the base class. 

It is shown by the eat() method. 

The derived class modifies existing behavior of the base class.

shown by the whoAmI() method. 

Finally, the derived class extends the functionality of the base class, by defining a new bark() method.
Special Methods
Finally lets go over special methods. Classes in Python can implement certain operations with special method names. These methods are not actually called directly but by Python specific language syntax. For example Lets create a Book class:
Can you write Python code for it?
assistant
#Here is the Python code you requested.

class Book(object):
    def __init__(self, title, author, pages):
        print "A book is created"
        self.title = title
        self.author = author
        self.pages = pages

    def __str__(self):
        return "Title:%s , author:%s, pages:%s " %(self.title, self.author, self.pages)

    def __len__(self):
        return self.pages

    def __del__(self):
        print "A book is destroyed"

book = Book("Python Rocks!", "Jose Portilla", 159)

#Special Methods
print book
print len(book)
del book