Python Object-Oriented programming example.

Object-Oriented-programming-example.py

# Python Object-Oriented programming

# Define a class called Dog
# Python class names are written in CapitalizedWords notation by convention. 
class Dog:
    # define a method called __init__ it is a special init method.
    # "__init__" is a reseved method in python classes. It is known as a constructor in object oriented concepts.
    # This method called when an object is created from the class and it allow the class to initialize the attributes of a class.
    def __init__ (self, name, age):
        # self represents the instance of the class. By using the "self" keyword. We can access the attibutes and methods of the
        # class in python.

        # define name and age as attributes.
        
        # Creates an attribute called name and assigns to it the value of the name parameter.
        # attribute  parameter
        #     |       |
        #     v       V
        self.name = name
        
        # Creates an attribute called age and assigns to it the value of the age parameter.
        # attribute  parameter
        #     |       |
        #     v       V
        self.age = age
    # instance method is a function
    # define the method called say_name
    def say_name(self):
        # display name
        print("Hello, my name is " + self.name ,".")
        
    # define the method called say_age
    def say_age(self):
        # display age
        print ("Hello, I am " ,self.age ,"years old.")
            
# create a instance
rocky = Dog("Rocky",5);

# call methods
rocky.say_name()
rocky.say_age()